SoundPool (Sound Pool)

The SoundPool module provides APIs for loading, unloading, playing, and stopping playing sounds, setting the volume, and setting the number of loops.

Before using these APIs, you must call media.createSoundPool to create a SoundPool instance.

NOTE

The initial APIs of this module are supported since API version 10. Newly added APIs will be marked with a superscript to indicate their earliest API version.

Modules to Import

import { media } from '@kit.MediaKit';
import { audio } from '@kit.AudioKit';

PlayParameters

Describes the playback parameters of the sound pool.

These parameters are used to control the playback volume, number of loops, and priority.

System capability: SystemCapability.Multimedia.Media.SoundPool

Name	Type	Mandatory	Description
loop	number	No	Number of loops. The value 0 means that the sound does not loop (the sound is played once), and -1 means that the sound loops forever. Default value: 0
rate	number	No	Playback rate. For details, see AudioRendererRate. Default value: 0
leftVolume	number	No	Volume of the left channel. The value ranges from 0.0 to 1.0. Default value: 1.0
rightVolume	number	No	Volume of the right channel. (Currently, the volume cannot be set separately for the left and right channels. The volume set for the left channel is used.) Default value: 1.0
priority	number	No	Playback priority. The value 0 means the lowest priority. A larger value indicates a higher priority. Default value: 0

SoundPool

Implements a sound pool that provides APIs for loading, unloading, playing, and stopping playing system sounds, setting the volume, and setting the number of loops. Before using these APIs, you must call createSoundPool to create a SoundPool instance.

NOTE

When using the SoundPool instance, you are advised to register the following callbacks to proactively obtain status changes:

• on('loadComplete'): listens for the event indicating that the resource loading is finished.
• on('playFinished'): listens for the event indicating that the playback is finished.
• on('error'): listens for error events.

load

load(uri: string, callback: AsyncCallback<number>): void

Loads a sound. This API uses an asynchronous callback to obtain the sound ID. The input parameter uri is a string starting with fd://, which is generated based on the file descriptor (FD) obtained. This API cannot be used to load resources in the rawfile directory. Instead, use load(fd: number, offset: number, length: number, callback: AsyncCallback<number>): void or load(fd: number, offset: number, length: number): Promise<number>.

NOTE

After the resource handle (in the form of an FD) or path description (in the form of a URI) is transferred to the AVPlayer, do not use the resource handle or path description in read or write operations, including but not limited to transferring it to multiple AVPlayers. Competition occurs when multiple AVPlayers use the same resource handle or path description to read and write files at the same time, resulting in playback errors.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name	Type	Mandatory	Description
uri	string	Yes	URI of the audio file to load. Generally, the URI starts with fd://.
callback	AsyncCallback<number>	Yes	Callback used to return the sound ID. A valid value must be greater than 0.

Error codes

For details about the error codes, see Media Error Codes.

ID	Error Message
5400102	Operation not allowed. Return by callback.
5400103	I/O error. Return by callback.
5400105	Service died. Return by callback.

Example

import { fileIo } from '@kit.CoreFileKit';
import { BusinessError } from '@kit.BasicServicesKit';

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  usage: audio.StreamUsage.STREAM_USAGE_MUSIC,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error: BusinessError, soundPool_: media.SoundPool) => {
  if (error) {
    console.error(`Failed to createSoundPool`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`Succeeded in createSoundPool`)
    let uri:string = "";
    let file: fileIo.File;
    // Obtain the URI starting with fd://.
    fileIo.open('/test_01.mp3', fileIo.OpenMode.READ_ONLY).then((file_: fileIo.File) => {
      file = file_;
      console.info("file fd: " + file.fd);
      uri = 'fd://' + (file.fd).toString()
      soundPool.load(uri, (error: BusinessError, soundId_: number) => {
        if (error) {
          console.error(`Failed to load soundPool: errCode is ${error.code}, errMessage is ${error.message}`)
        } else {
          console.info(`Succeeded in loading soundPool` + JSON.stringify(soundId_))
        }
      });
    }); // '/test_01.mp3' here is only an example. You need to pass in the actual URI.
  }
});

load

load(uri: string): Promise<number>

Loads a sound. This API uses a promise to obtain the sound ID. The input parameter uri is a starting with fd://, which is generated based on the FD obtained. This API cannot be used to load resources in the rawfile directory. Instead, use load(fd: number, offset: number, length: number, callback: AsyncCallback<number>): void or load(fd: number, offset: number, length: number): Promise<number>.

NOTE

After the resource handle (in the form of an FD) or path description (in the form of a URI) is transferred to the AVPlayer, do not use the resource handle or path description in read or write operations, including but not limited to transferring it to multiple AVPlayers. Competition occurs when multiple AVPlayers use the same resource handle or path description to read and write files at the same time, resulting in playback errors.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name	Type	Mandatory	Description
uri	string	Yes	URI of the audio file to load. Generally, the URI starts with fd://.

Return value

Type	Description
Promise<number>	Promise used to return the sound ID. A valid value must be greater than 0.

Error codes

For details about the error codes, see Media Error Codes.

ID	Error Message
5400102	Operation not allowed. Return by promise.
5400103	I/O error. Return by promise.
5400105	Service died. Return by promise.

Example

import { fileIo } from '@kit.CoreFileKit';
import { BusinessError } from '@kit.BasicServicesKit';

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  usage: audio.StreamUsage.STREAM_USAGE_MUSIC,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error: BusinessError, soundPool_: media.SoundPool) => {
  if (error) {
    console.error(`Failed to createSoundPool`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`Succeeded in createSoundPool`)
    let uri:string = "";
    let soundID: number = 0;
    let file: fileIo.File;
    // Obtain the URI starting with fd://.
    fileIo.open('/test_01.mp3', fileIo.OpenMode.READ_ONLY).then((file_: fileIo.File) => {
      file = file_;
      console.info("file fd: " + file.fd);
      uri = 'fd://' + (file.fd).toString()
      soundPool.load(uri).then((soundId: number) => {
        console.info('Succeeded in loading uri');
        soundID = soundId;
      }, (err: BusinessError) => {
        console.error('Failed to load soundPool and catch error is ' + err.message);
      });
    }); // '/test_01.mp3' here is only an example. You need to pass in the actual URI.
  }
});

load

load(fd: number, offset: number, length: number, callback: AsyncCallback<number>): void

Loads a sound. This API uses an asynchronous callback to obtain the sound ID. The input parameter fd can be manually input or automatically obtained by reading the embedded resource of the application.

NOTE

After the resource handle (in the form of an FD) or path description (in the form of a URI) is transferred to the AVPlayer, do not use the resource handle or path description in read or write operations, including but not limited to transferring it to multiple AVPlayers. Competition occurs when multiple AVPlayers use the same resource handle or path description to read and write files at the same time, resulting in playback errors.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name	Type	Mandatory	Description
fd	number	Yes	Resource handle, which is obtained by calling resourceManager.getRawFd.
offset	number	Yes	Resource offset, which needs to be entered based on the preset resource information. An invalid value causes a failure to parse audio and video resources.
length	number	Yes	Resource length, which needs to be entered based on the preset resource information. An invalid value causes a failure to parse audio and video resources.
callback	AsyncCallback<number>	Yes	Callback used to return the sound ID. A valid value must be greater than 0.

Error codes

For details about the error codes, see Media Error Codes.

ID	Error Message
5400102	Operation not allowed. Return by callback.
5400103	I/O error. Return by callback.
5400105	Service died. Return by callback.

Example 1:

import { fileIo } from '@kit.CoreFileKit';
import { BusinessError } from '@kit.BasicServicesKit';

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  usage: audio.StreamUsage.STREAM_USAGE_MUSIC,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error: BusinessError, soundPool_: media.SoundPool) => {
  if (error) {
    console.error(`Failed to createSoundPool`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`Succeeded in createSoundPool`)
    let file: fileIo.File;
    let soundID: number = 0;
    let fileSize: number = 1; // Obtain the size through fileIo.stat().
    let uri: string = "";
    // Obtain the FD. The test_01.mp3 file is not an audio file in the rawfile directory.
    fileIo.open('/test_01.mp3', fileIo.OpenMode.READ_ONLY).then((file_: fileIo.File) => {
      file = file_;
      console.info("file fd: " + file.fd);
      uri = 'fd://' + (file.fd).toString()
      soundPool.load(file.fd, 0, fileSize, (error: BusinessError, soundId_: number) => {
        if (error) {
          console.error(`Failed to load soundPool: errCode is ${error.code}, errMessage is ${error.message}`)
        } else {
          soundID = soundId_;
          console.info('Succeeded in loading soundId:' + soundId_);
        }
      });
    }); // '/test_01.mp3' here is only an example. You need to pass in the actual URI.
  }
});

Example 2

import { media } from '@kit.MediaKit';
import { audio } from '@kit.AudioKit';
import { BusinessError } from '@kit.BasicServicesKit';

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  usage: audio.StreamUsage.STREAM_USAGE_MUSIC,
  rendererFlags: 1
}
let soundID: number = 0;
media.createSoundPool(5, audioRendererInfo, async (error: BusinessError, soundPool_: media.SoundPool) => {
  if (error) {
    console.error(`Failed to createSoundPool`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`Succeeded in createSoundPool`)
    // The test_01.mp3 file is an audio file in the rawfile directory.
    let fileDescriptor = await getContext().resourceManager.getRawFd('test_01.mp3');
    soundPool.load(fileDescriptor.fd, fileDescriptor.offset, fileDescriptor.length, (error: BusinessError, soundId_: number) => {
      if (error) {
        console.error(`Failed to load soundPool: errCode is ${error.code}, errMessage is ${error.message}`)
      } else {
        soundID = soundId_;
        console.info('Succeeded in loading soundId:' + soundId_);
      }
    });
  }
});

load

load(fd: number, offset: number, length: number): Promise<number>

Loads a sound. This API uses a promise to obtain the sound ID. The input parameter fd can be manually input or automatically obtained by reading the embedded resource of the application.

NOTE

After the resource handle (in the form of an FD) or path description (in the form of a URI) is transferred to the AVPlayer, do not use the resource handle or path description in read or write operations, including but not limited to transferring it to multiple AVPlayers. Competition occurs when multiple AVPlayers use the same resource handle or path description to read and write files at the same time, resulting in playback errors.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name	Type	Mandatory	Description
fd	number	Yes	Resource handle, which is obtained by calling resourceManager.getRawFd.
offset	number	Yes	Resource offset, which needs to be entered based on the preset resource information. An invalid value causes a failure to parse audio and video resources.
length	number	Yes	Resource length, which needs to be entered based on the preset resource information. An invalid value causes a failure to parse audio and video resources.

Return value

Type	Description
Promise<number>	Promise used to return the sound ID. A valid value must be greater than 0.

Error codes

For details about the error codes, see Media Error Codes.

ID	Error Message
5400102	Operation not allowed. Return by promise.
5400103	I/O error. Return by promise.
5400105	Service died. Return by promise.

Example 1:

import { fileIo } from '@kit.CoreFileKit';
import { BusinessError } from '@kit.BasicServicesKit';

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  usage: audio.StreamUsage.STREAM_USAGE_MUSIC,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error: BusinessError, soundPool_: media.SoundPool) => {
  if (error) {
    console.error(`Failed to createSoundPool`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`Succeeded in createSoundPool`)
    let file: fileIo.File;
    let soundID: number = 0;
    let fileSize: number = 1; // Obtain the size through fileIo.stat().
    let uri: string = "";
    // Obtain the FD. The test_01.mp3 file is not an audio file in the rawfile directory.
    fileIo.open('/test_01.mp3', fileIo.OpenMode.READ_ONLY).then((file_: fileIo.File) => {
      file = file_;
      console.info("file fd: " + file.fd);
      uri = 'fd://' + (file.fd).toString()
      soundPool.load(file.fd, 0, fileSize).then((soundId: number) => {
        console.info('Succeeded in loading soundpool');
        soundID = soundId;
      }, (err: BusinessError) => {
        console.error('Failed to load soundpool and catch error is ' + err.message);
      });
    });
  }
});

Example 2

import { media } from '@kit.MediaKit';
import { audio } from '@kit.AudioKit';
import { BusinessError } from '@kit.BasicServicesKit';

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  usage: audio.StreamUsage.STREAM_USAGE_MUSIC,
  rendererFlags: 1
}
let soundID: number = 0;
media.createSoundPool(5, audioRendererInfo, async (error: BusinessError, soundPool_: media.SoundPool) => {
  if (error) {
    console.error(`Failed to createSoundPool`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`Succeeded in createSoundPool`)
    // The test_01.mp3 file is an audio file in the rawfile directory.
    let fileDescriptor = await getContext().resourceManager.getRawFd('test_01.mp3');
    soundPool.load(fileDescriptor.fd, fileDescriptor.offset, fileDescriptor.length).then((soundId: number) => {
      console.info('Succeeded in loading soundpool');
      soundID = soundId;
    }, (err: BusinessError) => {
      console.error('Failed to load soundpool and catch error is ' + err.message);
    });
  }
});

play

play(soundID: number, params: PlayParameters, callback: AsyncCallback<number>): void

Plays a sound. This API uses an asynchronous callback to obtain the audio stream ID.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name	Type	Mandatory	Description
soundID	number	Yes	Sound ID, which is obtained by calling load().
params	PlayParameters	Yes	Playback parameters.
callback	AsyncCallback<number>	Yes	Callback used to return the audio stream ID. A valid value must be greater than 0.

Error codes

For details about the error codes, see Media Error Codes.

ID	Error Message
401	Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types. 3.Parameter verification failed. Return by callback.
5400102	Operation not allowed. Return by callback.
5400105	Service died. Return by callback.

Example

import { BusinessError } from '@kit.BasicServicesKit';

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  usage: audio.StreamUsage.STREAM_USAGE_MUSIC,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error: BusinessError, soundPool_: media.SoundPool) => {
  if (error) {
    console.error(`Failed to createSoundPool`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`Succeeded in createSoundPool`)
    let soundID: number = 0;
    let streamID: number = 0;
    let playParameters: media.PlayParameters = {
      loop: 3, // The sound is played four times (three loops).
      rate: audio.AudioRendererRate.RENDER_RATE_NORMAL, // The sound is played at the original frequency.
      leftVolume: 0.5, // range = 0.0-1.0
      rightVolume: 0.5, // range = 0.0-1.0
      priority: 0, // The sound playback has the lowest priority.
    }
    soundPool.play(soundID, playParameters, (error: BusinessError, streamId: number) => {
      if (error) {
        console.error(`Failed to play soundpool: errCode is ${error.code}, errMessage is ${error.message}`)
      } else {
        streamID = streamId;
        console.info('Succeeded in playing soundpool, streamId:' + streamId);
      }
    });
  }
});

play

play(soundID: number, callback: AsyncCallback<number>): void

Plays a sound. This API uses an asynchronous callback to obtain the audio stream ID.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name	Type	Mandatory	Description
soundID	number	Yes	Sound ID, which is obtained by calling load().
callback	AsyncCallback<number>	Yes	Callback used to return the audio stream ID. A valid value must be greater than 0.

Error codes

For details about the error codes, see Media Error Codes.

ID	Error Message
401	Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types. 3.Parameter verification failed. Return by callback.
5400102	Operation not allowed. Return by callback.
5400105	Service died. Return by callback.

Example

import { BusinessError } from '@kit.BasicServicesKit';

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  usage: audio.StreamUsage.STREAM_USAGE_MUSIC,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error: BusinessError, soundPool_: media.SoundPool) => {
  if (error) {
    console.error(`Failed to createSoundPool`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`Succeeded in createSoundPool`)
    let soundID: number = 0;
    let streamID: number = 0;
    soundPool.play(soundID,  (error: BusinessError, streamId: number) => {
      if (error) {
        console.error(`Failed to play soundpool: errCode is ${error.code}, errMessage is ${error.message}`)
      } else {
        streamID = streamId;
        console.info('Succeeded in playing soundpool, streamId:' + streamId);
      }
    });
  }
});

play

play(soundID: number, params?: PlayParameters): Promise<number>

Plays a sound. This API uses a promise to obtain the audio stream ID.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name	Type	Mandatory	Description
soundID	number	Yes	Sound ID, which is obtained by calling load().
params	PlayParameters	No	Playback parameters.

Return value

Type	Description
Promise<number>	Promise used to return the audio stream ID. A valid value must be greater than 0.

Error codes

For details about the error codes, see Media Error Codes.

ID	Error Message
401	Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types. 3.Parameter verification failed. Return by promise.
5400102	Operation not allowed. Return by promise.
5400105	Service died. Return by promise.

Example

import { BusinessError } from '@kit.BasicServicesKit';

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  usage: audio.StreamUsage.STREAM_USAGE_MUSIC,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error: BusinessError, soundPool_: media.SoundPool) => {
  if (error) {
    console.error(`Failed to createSoundPool`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`Succeeded in createSoundPool`)
    let soundID: number = 0;
    let streamID: number = 0;
    let playParameters: media.PlayParameters = {
      loop: 3, // The sound is played four times (three loops).
      rate: audio.AudioRendererRate.RENDER_RATE_NORMAL, // The sound is played at the original frequency.
      leftVolume: 0.5, // range = 0.0-1.0.
      rightVolume: 0.5, // range = 0.0-1.0.
      priority: 0, // The sound playback has the lowest priority.
    }

    soundPool.play(soundID, playParameters).then((streamId: number) => {
      console.info('Succeeded in playing soundpool');
      streamID = streamId;
    },(err: BusinessError) => {
      console.error('Failed to play soundpool and catch error is ' + err.message);
    });
  }
});

stop

stop(streamID: number, callback: AsyncCallback<void>): void

Stops playing a sound. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name	Type	Mandatory	Description
streamID	number	Yes	Audio stream ID, which is obtained by calling play().
callback	AsyncCallback<void>	Yes	Callback used to return the result.

Error codes

For details about the error codes, see Media Error Codes.

ID	Error Message
401	Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types. 3.Parameter verification failed. Return by callback.
5400102	Operation not allowed. Return by callback.
5400105	Service died. Return by callback.

Example

import { BusinessError } from '@kit.BasicServicesKit';

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  usage: audio.StreamUsage.STREAM_USAGE_MUSIC,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error: BusinessError, soundPool_: media.SoundPool) => {
  if (error) {
    console.error(`Failed to createSoundPool`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`Succeeded in createSoundPool`)
    let streamID: number = 0;
    // Call play() to obtain the stream ID.
    soundPool.stop(streamID, (error: BusinessError) => {
      if (error) {
        console.error(`Failed to stop soundpool: errCode is ${error.code}, errMessage is ${error.message}`)
      } else {
        console.info('Succeeded in stopping soundpool');
      }
    })
  }
});

stop

stop(streamID: number): Promise<void>

Stops playing a sound. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name	Type	Mandatory	Description
streamID	number	Yes	Audio stream ID, which is obtained by calling play().

Return value

Type	Description
Promise<void>	Promise that returns no value.

Error codes

For details about the error codes, see Media Error Codes.

ID	Error Message
401	Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types. 3.Parameter verification failed. Return by promise.
5400102	Operation not allowed. Return by promise.
5400105	Service died. Return by promise.

Example

import { BusinessError } from '@kit.BasicServicesKit';

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  usage: audio.StreamUsage.STREAM_USAGE_MUSIC,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error: BusinessError, soundPool_: media.SoundPool) => {
  if (error) {
    console.error(`Failed to createSoundPool`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`Succeeded in createSoundPool`)
    let streamID: number = 0;
    // Call play() to obtain the stream ID.
    soundPool.stop(streamID).then(() => {
      console.info('Succeeded in stopping soundpool');
    }, (err: BusinessError) => {
      console.error('Failed to stop soundpool and catch error is ' + err.message);
    });
  }
});

setLoop

setLoop(streamID: number, loop: number, callback: AsyncCallback<void>): void;

Sets the loop mode for an audio stream. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name	Type	Mandatory	Description
streamID	number	Yes	Audio stream ID, which is obtained by calling play().
loop	number	Yes	Number of loops. The value 0 means that the sound does not loop (the sound is played once), and -1 means that the sound loops forever.
callback	AsyncCallback<void>	Yes	Callback used to return the result.

Error codes

For details about the error codes, see Media Error Codes.

ID	Error Message
401	Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types. 3.Parameter verification failed. Return by callback.
5400102	Operation not allowed. Return by callback.
5400105	Service died. Return by callback.

Example

import { BusinessError } from '@kit.BasicServicesKit';

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  usage: audio.StreamUsage.STREAM_USAGE_MUSIC,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error: BusinessError, soundPool_: media.SoundPool) => {
  if (error) {
    console.error(`Failed to createSoundPool`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`Succeeded in createSoundPool`)
    let streamID: number = 0;
    // Call play() to obtain the stream ID.
    // Set the number of loops to 2.
    soundPool.setLoop(streamID, 2, (error: BusinessError) => {
      if (error) {
        console.error(`Failed to setLoop soundPool: errCode is ${error.code}, errMessage is ${error.message}`)
      } else {
        console.info('Succeeded in setLoopping soundpool, streamID:' + streamID);
      }
    });
  }
});

setLoop

setLoop(streamID: number, loop: number): Promise<void>

Sets the loop mode for an audio stream. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name	Type	Mandatory	Description
streamID	number	Yes	Audio stream ID, which is obtained by calling play().
loop	number	Yes	Number of loops. The value 0 means that the sound does not loop (the sound is played once), and -1 means that the sound loops forever.

Return value

Type	Description
Promise<void>	Promise that returns no value.

Error codes

For details about the error codes, see Media Error Codes.

ID	Error Message
401	Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types. 3.Parameter verification failed. Return by promise.
5400102	Operation not allowed. Return by promise.
5400105	Service died. Return by promise.

Example

import { BusinessError } from '@kit.BasicServicesKit';

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  usage: audio.StreamUsage.STREAM_USAGE_MUSIC,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error: BusinessError, soundPool_: media.SoundPool) => {
  if (error) {
    console.error(`Failed to createSoundPool`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`Succeeded in createSoundPool`)
    let streamID: number = 0;
    // Call play() to obtain the stream ID.
    // Set the number of loops to 1.
    soundPool.setLoop(streamID, 1).then(() => {
      console.info('Succeeded in setLoopping soundpool, streamID:' + streamID);
    }).catch((err: BusinessError) => {
      console.error('Failed to setLoop soundPool and catch error is ' + err.message);
    });
  }
});

setPriority

setPriority(streamID: number, priority: number, callback: AsyncCallback<void>): void

Sets the priority for an audio stream. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name	Type	Mandatory	Description
streamID	number	Yes	Audio stream ID, which is obtained by calling play().
priority	number	Yes	Priority. The value 0 means the lowest priority.
callback	AsyncCallback<void>	Yes	Callback used to return the result.

Error codes

For details about the error codes, see Media Error Codes.

ID	Error Message
401	Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types. 3.Parameter verification failed. Return by callback.
5400102	Operation not allowed. Return by callback.
5400105	Service died. Return by callback.

Example

import { BusinessError } from '@kit.BasicServicesKit';

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  usage: audio.StreamUsage.STREAM_USAGE_MUSIC,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error: BusinessError, soundPool_: media.SoundPool) => {
  if (error) {
    console.error(`Failed to createSoundPool`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`Succeeded in createSoundPool`)
    let streamID: number = 0;
    // Call play() to obtain the stream ID.
    // Set the priority to 1.
    soundPool.setPriority(streamID, 1, (error: BusinessError) => {
      if (error) {
        console.error(`Failed to setPriority soundPool: errCode is ${error.code}, errMessage is ${error.message}`)
      } else {
        console.info('Succeeded in setPriority soundpool, streamID:' + streamID);
      }
    });
  }
});

setPriority

setPriority(streamID: number, priority: number): Promise<void>

Sets the priority for an audio stream. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name	Type	Mandatory	Description
streamID	number	Yes	Audio stream ID, which is obtained by calling play().
priority	number	Yes	Priority. The value 0 means the lowest priority.

Return value

Type	Description
Promise<void>	Promise that returns no value.

Error codes

For details about the error codes, see Media Error Codes.

ID	Error Message
401	Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types. 3.Parameter verification failed. Return by promise.
5400102	Operation not allowed. Return by promise.
5400105	Service died. Return by promise.

Example

import { BusinessError } from '@kit.BasicServicesKit';

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  usage: audio.StreamUsage.STREAM_USAGE_MUSIC,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error: BusinessError, soundPool_: media.SoundPool) => {
  if (error) {
    console.error(`Failed to createSoundPool`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`Succeeded in createSoundPool`)
    let streamID: number = 0;
    // Call play() to obtain the stream ID.
    // Set the priority to 1.

    soundPool.setPriority(streamID, 1).then(() => {
      console.info('Succeeded in setPriority soundpool');
    }, (err: BusinessError) => {
      console.error('Failed to setPriority soundPool and catch error is ' + err.message);
    });
  }
});

setRate

setRate(streamID: number, rate: audio.AudioRendererRate, callback: AsyncCallback<void>): void

Sets the playback rate for an audio stream. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name	Type	Mandatory	Description
streamID	number	Yes	Audio stream ID, which is obtained by calling play().
rate	audio.AudioRendererRate	Yes	Playback rate.
callback	AsyncCallback<void>	Yes	Callback used to return the result.

Error codes

For details about the error codes, see Media Error Codes.

ID	Error Message
401	Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types. 3.Parameter verification failed. Return by callback.
5400102	Operation not allowed. Return by callback.
5400105	Service died. Return by callback.

Example

import { BusinessError } from '@kit.BasicServicesKit';

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  usage: audio.StreamUsage.STREAM_USAGE_MUSIC,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error: BusinessError, soundPool_: media.SoundPool) => {
  if (error) {
    console.error(`Failed to createSoundPool`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`Succeeded in createSoundPool`)
    let streamID: number = 0;
    let selectedAudioRendererRate: audio.AudioRendererRate = audio.AudioRendererRate.RENDER_RATE_NORMAL; // The sound is played at the original frequency.
    // Call play() to obtain the stream ID.
    soundPool.setRate(streamID, selectedAudioRendererRate, (error: BusinessError) => {
      if (error) {
        console.error(`Failed to setRate soundPool: errCode is ${error.code}, errMessage is ${error.message}`)
      } else {
        console.info('Succeeded in setRate success, streamID:' + streamID);
      }
    })
  }
});

setRate

setRate(streamID: number, rate: audio.AudioRendererRate): Promise<void>

Sets the playback rate for an audio stream. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name	Type	Mandatory	Description
streamID	number	Yes	Audio stream ID, which is obtained by calling play().
rate	audio.AudioRendererRate	Yes	Playback rate.

Return value

Type	Description
Promise<void>	Promise that returns no value.

Error codes

For details about the error codes, see Media Error Codes.

ID	Error Message
401	Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types. 3.Parameter verification failed. Return by promise.
5400102	Operation not allowed. Return by promise.
5400105	Service died. Return by promise.

Example

import { BusinessError } from '@kit.BasicServicesKit';

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  usage: audio.StreamUsage.STREAM_USAGE_MUSIC,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error: BusinessError, soundPool_: media.SoundPool) => {
  if (error) {
    console.error(`Failed to createSoundPool`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`Succeeded in createSoundPool`)
    let streamID: number = 0;
    let selectedAudioRendererRate: audio.AudioRendererRate = audio.AudioRendererRate.RENDER_RATE_NORMAL; // The sound is played at the original frequency.
    // Call play() to obtain the stream ID.
    soundPool.setRate(streamID, selectedAudioRendererRate).then(() => {
      console.info('Succeeded in setRate soundpool');
    }, (err: BusinessError) => {
      console.error('Failed to setRate soundpool and catch error is ' + err.message);
    });
  }
});

setVolume

setVolume(streamID: number, leftVolume: number, rightVolume: number, callback: AsyncCallback<void>): void

Sets the volume for an audio stream. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name	Type	Mandatory	Description
streamID	number	Yes	Audio stream ID, which is obtained by calling play().
leftVolume	number	Yes	Volume of the left channel. The value ranges from 0.0 to 1.0.
rightVolume	number	Yes	Volume of the right channel. Currently, setting the volume for the right channel does not take effect. The volume set for the left channel is used.
callback	AsyncCallback<void>	Yes	Callback used to return the result.

Error codes

For details about the error codes, see Media Error Codes.

ID	Error Message
401	Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types. 3.Parameter verification failed. Return by callback.
5400102	Operation not allowed. Return by callback.
5400105	Service died. Return by callback.

Example

import { BusinessError } from '@kit.BasicServicesKit';

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  usage: audio.StreamUsage.STREAM_USAGE_MUSIC,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error: BusinessError, soundPool_: media.SoundPool) => {
  if (error) {
    console.error(`Failed to createSoundPool`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`Succeeded in createSoundPool`)
    let streamID: number = 0;
    // Call play() to obtain the stream ID.
    // Set the volume to 0.5.
    soundPool.setVolume(streamID, 0.5, 0.5, (error: BusinessError) => {
      if (error) {
        console.error(`Failed to setVolume soundPool: errCode is ${error.code}, errMessage is ${error.message}`)
      } else {
        console.info('Succeeded in setVolume soundpool, streamID:' + streamID);
      }
    })
  }
});

setVolume

setVolume(streamID: number, leftVolume: number, rightVolume: number): Promise<void>

Sets the volume for an audio stream. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name	Type	Mandatory	Description
streamID	number	Yes	Audio stream ID, which is obtained by calling play().
leftVolume	number	Yes	Volume of the left channel. The value ranges from 0.0 to 1.0.
rightVolume	number	Yes	Volume of the right channel. Currently, setting the volume for the right channel does not take effect. The volume set for the left channel is used.

Return value

Type	Description
Promise<void>	Promise that returns no value.

Error codes

For details about the error codes, see Media Error Codes.

ID	Error Message
401	Parameter error. Possible causes: 1.Mandatory parameters are left unspecified. 2.Incorrect parameter types. 3.Parameter verification failed. Return by promise.
5400102	Operation not allowed. Return by promise.
5400105	Service died. Return by promise.

Example

import { BusinessError } from '@kit.BasicServicesKit';

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  usage: audio.StreamUsage.STREAM_USAGE_MUSIC,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error: BusinessError, soundPool_: media.SoundPool) => {
  if (error) {
    console.error(`Failed to createSoundPool`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`Succeeded in createSoundPool`)
    let streamID: number = 0;
    // Call play() to obtain the stream ID.

    soundPool.setVolume(streamID, 0.5, 0.5).then(() => {
      console.info('Succeeded in setVolume soundpool');
    }, (err: BusinessError) => {
      console.error('Failed to setVolume soundPool and catch error is ' + err.message);
    });
  }
});

unload

unload(soundID: number, callback: AsyncCallback<void>): void

Unloads a sound. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name	Type	Mandatory	Description
soundID	number	Yes	Sound ID, which is obtained by calling load().
callback	AsyncCallback<void>	Yes	Callback used to return the result.

Error codes

For details about the error codes, see Media Error Codes.

ID	Error Message
5400102	Operation not allowed. Return by callback.
5400103	I/O error. Return by callback.
5400105	Service died. Return by callback.

Example

import { BusinessError } from '@kit.BasicServicesKit';

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  usage: audio.StreamUsage.STREAM_USAGE_MUSIC,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error: BusinessError, soundPool_: media.SoundPool) => {
  if (error) {
    console.error(`Failed to createSoundPool`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`Succeeded in createSoundPool`)
    let soundID: number = 0;
    // Call load() to obtain the sound ID.
    soundPool.unload(soundID, (error: BusinessError) => {
      if (error) {
        console.error(`Failed to unload soundPool: errCode is ${error.code}, errMessage is ${error.message}`)
      } else {
        console.info('Succceeded in unload soundPool');
      }
    })
  }
});

unload

unload(soundID: number): Promise<void>

Unloads a sound. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name	Type	Mandatory	Description
soundID	number	Yes	Sound ID, which is obtained by calling load().

Return value

Type	Description
Promise<void>	Promise that returns no value.

Error codes

For details about the error codes, see Media Error Codes.

ID	Error Message
5400102	Operation not allowed. Return by promise.
5400103	I/O error. Return by promise.
5400105	Service died. Return by promise.

Example

import { BusinessError } from '@kit.BasicServicesKit';

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  usage: audio.StreamUsage.STREAM_USAGE_MUSIC,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error: BusinessError, soundPool_: media.SoundPool) => {
  if (error) {
    console.error(`Failed to createSoundPool`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`Succeeded in createSoundPool`)
    let soundID: number = 0;
    // Call load() to obtain the sound ID.

    soundPool.unload(soundID).then(() => {
      console.info('Succceeded in unload soundPool');
    }, (err: BusinessError) => {
      console.error('Failed to unload soundPool and catch error is ' + err.message);
    });
  }
});

release

release(callback: AsyncCallback<void>): void

Releases this SoundPool instance. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name	Type	Mandatory	Description
callback	AsyncCallback<void>	Yes	Callback used to return the result.

Error codes

For details about the error codes, see Media Error Codes.

ID	Error Message
5400105	Service died. Return by callback.

Example

import { BusinessError } from '@kit.BasicServicesKit';

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  usage: audio.StreamUsage.STREAM_USAGE_MUSIC,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error: BusinessError, soundPool_: media.SoundPool) => {
  if (error) {
    console.error(`Failed to createSoundPool`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`Succeeded in createSoundPool`)
    soundPool.release((error: BusinessError) => {
      if (error) {
        console.error(`Failed to release soundPool: errCode is ${error.code}, errMessage is ${error.message}`)
      } else {
        console.info('Succeeded in releasing soundPool');
      }
    })
  }
});

release

release(): Promise<void>

Releases this SoundPool instance. This API uses a promise to return the result.

System capability: SystemCapability.Multimedia.Media.SoundPool

Return value

Type	Description
Promise<void>	Promise that returns no value.

Error codes

For details about the error codes, see Media Error Codes.

ID	Error Message
5400105	Service died. Return by promise.

Example

import { BusinessError } from '@kit.BasicServicesKit';

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  usage: audio.StreamUsage.STREAM_USAGE_MUSIC,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error: BusinessError, soundPool_: media.SoundPool) => {
  if (error) {
    console.error(`Failed to createSoundPool`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`Succeeded in createSoundPool`)
    soundPool.release().then(() => {
      console.info('Succeeded in releasing soundPool');
    }, (err: BusinessError) => {
      console.error('Failed to release soundPool and catch error is ' + err.message);
    });
  }
});

on('loadComplete')

on(type: 'loadComplete', callback: Callback<number>): void

Subscribes to events indicating that a sound finishes loading.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type, which is 'loadComplete' in this case. This event is triggered when a sound is loaded.
callback	Callback<number>	Yes	ID of the sound that has been loaded.

Example

import { BusinessError } from '@kit.BasicServicesKit';

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  usage: audio.StreamUsage.STREAM_USAGE_MUSIC,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error: BusinessError, soundPool_: media.SoundPool) => {
  if (error) {
    console.error(`Failed to createSoundPool`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`Succeeded in createSoundPool`)
    soundPool.on('loadComplete', (soundId: number) => {
      console.info('Succeeded in loadComplete, soundId: ' + soundId)
    })
  }
});

off('loadComplete')

off(type: 'loadComplete'): void

Unsubscribes from events indicating that a sound finishes loading.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The value is fixed at 'loadComplete'.

Example

import { BusinessError } from '@kit.BasicServicesKit';

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  usage: audio.StreamUsage.STREAM_USAGE_MUSIC,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error: BusinessError, soundPool_: media.SoundPool) => {
  if (error) {
    console.error(`Failed to createSoundPool`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`Succeeded in createSoundPool`)
    soundPool.off('loadComplete')
  }
});

on('playFinished')

on(type: 'playFinished', callback: Callback<void>): void

Subscribes to events indicating that a sound finishes playing.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type, which is 'playFinished' in this case. This event is triggered when a sound finishes playing.
callback	Callback<void>	Yes	Callback used to return the result.

Example

import { BusinessError } from '@kit.BasicServicesKit';

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  usage: audio.StreamUsage.STREAM_USAGE_MUSIC,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error: BusinessError, soundPool_: media.SoundPool) => {
  if (error) {
    console.error(`Failed to createSoundPool`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`Succeeded in createSoundPool`)
    soundPool.on('playFinished', () => {
      console.info('Succeeded in playFinished')
    });
  }
});

off('playFinished')

off(type: 'playFinished'): void

Unsubscribes from events indicating that a sound finishes playing.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The value is fixed at 'playFinished'.

Example

import { BusinessError } from '@kit.BasicServicesKit';

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  usage: audio.StreamUsage.STREAM_USAGE_MUSIC,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error: BusinessError, soundPool_: media.SoundPool) => {
  if (error) {
    console.error(`Failed to createSoundPool`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`Succeeded in createSoundPool`)
    soundPool.off('playFinished')
  }
});

on('error')

on(type: 'error', callback: ErrorCallback): void

Subscribes to error events of this SoundPool instance. This event is used only for error prompt.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type, which is 'error' in this case. This event can be triggered by both user operations and the system.
callback	ErrorCallback	Yes	Callback used to return the error code ID and error message.

The SoundPool class provides the following error types:

ID	Error Message	Description
401	Invalid Parameter.	Incorrect input parameter, causing an invalid call.
801	Unsupport Capability.	Unsupported API, causing an invalid call.
5400101	No Memory.	Insufficient memory.
5400102	Operation Not Allowed.	Unsupported operation in the current state, causing an invalid call.
5400103	IO Error.	I/O exception.
5400105	Service Died.	The playback process is dead, and the service on which the sound pool depends is abnormal.

Example

import { BusinessError } from '@kit.BasicServicesKit';

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  usage: audio.StreamUsage.STREAM_USAGE_MUSIC,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error: BusinessError, soundPool_: media.SoundPool) => {
  if (error) {
    console.error(`Failed to createSoundPool`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`Succeeded in createSoundPool`)
    soundPool.on('error', (error: BusinessError) => {
      console.error('error happened,and error message is :' + error.message)
      console.error('error happened,and error code is :' + error.code)
    })
  }
});

off('error')

off(type: 'error'): void

Unsubscribes from error events of this SoundPool instance.

System capability: SystemCapability.Multimedia.Media.SoundPool

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type, which is 'error' in this case.

Example

import { BusinessError } from '@kit.BasicServicesKit';

// Create a SoundPool instance.
let soundPool: media.SoundPool;
let audioRendererInfo: audio.AudioRendererInfo = {
  usage: audio.StreamUsage.STREAM_USAGE_MUSIC,
  rendererFlags: 1
}
media.createSoundPool(5, audioRendererInfo, (error: BusinessError, soundPool_: media.SoundPool) => {
  if (error) {
    console.error(`Failed to createSoundPool`)
    return;
  } else {
    soundPool = soundPool_;
    console.info(`Succeeded in createSoundPool`)
    soundPool.off('error')
  }
});