Help! Need infinite sustained notes for cheap...

[onyxrhino]

Okay, so I have a friend who is a cellist and needs something that will generate single sustained notes (like say, a constant D note) for her to practice scales and intonation with. She doesn't have an amp, otherwise, I would just suggest an oscillator. Need something sub $50. Needs to be hands free. Any ideas? I was thinking a cheap keyboard or something may have a feature where you could play a note and have it sustain infinitely, but I have no idea if there is a cheap one that can do this.

Also, should note that I believe she has an ipad, so if you know of a cheap app that can do this too, let me know.

[12XU2A3X3]

breadboard something with a 555 chip for like $5

[skullservant]

Also, should note that I believe she has an ipad, so if you know of a cheap app that can do this too, let me know.

There are guitar tuners that you can have play the notes indefinitely

[Echoes22]

if she has an ipad, she could just use Garageband to do this.. and she wouldn't have to spend anything

[behndy]

yah. a few of the synths like AniMoog have hold settings so it'll loop the note you hit, but just go into Garageband and do a pattern with that note and loop it?

[TweedBassman]

Also, should note that I believe she has an ipad, so if you know of a cheap app that can do this too, let me know.

There are guitar tuners that you can have play the notes indefinitely

this, i have an old $10 Korg tuner that does it.

I bet there's a free ipad app that is way better though.