The frequency you want the dial on is 432hz not 440.
432 App | 432Hz Player
Play all your music library in the A=432hz tuning. Welcome to the 432hz Player App that enables you to play all your music in 432hz.
https://www.432player.com/The frequency you want the dial on is 432hz not 440.
Play all your music library in the A=432hz tuning. Welcome to the 432hz Player App that enables you to play all your music in 432hz.
https://www.432player.com/