All audio files are from: https://freesound.org/people/Teddy_Frost/

All are licensed under the Creative Commons 0 (CC0) license.

You can copy, modify, distribute, and perform the sound, even for commercial purposes, all without the need of asking permission from the author.

E4.wav by Teddy_Frost — https://freesound.org/s/334542/ — License: Creative Commons 0

F4.wav by Teddy_Frost — https://freesound.org/s/334541/ — License: Creative Commons 0

G4.wav by Teddy_Frost — https://freesound.org/s/334540/ — License: Creative Commons 0

B4.wav by Teddy_Frost — https://freesound.org/s/334539/ — License: Creative Commons 0

C4.wav by Teddy_Frost — https://freesound.org/s/334538/ — License: Creative Commons 0

C5.wav by Teddy_Frost — https://freesound.org/s/334537/ — License: Creative Commons 0

D4.wav by Teddy_Frost — https://freesound.org/s/334536/ — License: Creative Commons 0

A4.wav by Teddy_Frost — https://freesound.org/s/334534/ — License: Creative Commons 0