CAJUN ACCORDION DISCUSSION GROUP
Need to learn that song you have on MP3? Need the accordion key to match yours? Need it to slow down so you can practice? AnyTune for your phone.
Very similar to Amazing Slow Downer and Audacity.
I have been using AnyTune on my phone for a few years, and it is very good.
I use Amazing Slow Downer on my PC, and I had it for a while on my phone, but I think AnyTune is better.