๐ŸŽน๐Ÿชœโ€ฒอต

#octave designation #helmholtz system #musical scale #keyboard octaves #prime #subprime

๐ŸŽน#๏ธโƒฃ๐Ÿ“ˆ

#keyboard octaves #SPN #pitch range #piano notation #MIDI Notes #octave numbering #musical scale