Widget that plays a specific musical note?

[zijin_cheng]

I’m looking for a widget the size of an app icon that will play a specific musical note when I tap it, for example middle C.

I would like to drop this onto my home screen so I can easily tune instruments/vocals to it.



I know there are piano apps that have piano widgets with 8+ piano keys but those are too big so those won't fit on my home screen.