This sound effect can be found on Orchestral Colours, which was made by Best Service.
https://soundeffects.fandom.com/wiki/File:49_C_MAJ-stereo.wav https://soundeffects.fandom.com/wiki/File:49_D-sharp_MAJ-stereo.wav https://soundeffects.fandom.com/wiki/File:49_F-sharp_MAJ-stereo.wav https://soundeffects.fandom.com/wiki/File:49_A_MAJ-stereo.wav https://soundeffects.fandom.com/wiki/File:49_C_MIN-stereo.wav https://soundeffects.fandom.com/wiki/File:49_D-sharp_MIN-stereo.wav https://soundeffects.fandom.com/wiki/File:49_F-sharp_MIN-stereo.wav https://soundeffects.fandom.com/wiki/File:49_A_MIN-stereo.wav https://soundeffects.fandom.com/wiki/File:49_C_DIM-stereo.wav https://soundeffects.fandom.com/wiki/File:49_D-sharp_DIM-stereo.wav https://soundeffects.fandom.com/wiki/File:49_F-sharp_DIM-stereo.wav https://soundeffects.fandom.com/wiki/File:49_A_DIM-stereo.wav