Use APKPure App
Get Control MP3 old version APK for Android
Control Sound Speed(SoundRate) of your mp3/3gp or Repeat it from where you want.
When you practice Song/Dance to be better,
When you study other language to listen and speak,
When you have to listen recorded lecture(3gp also supported),
You can control its Sound speed(Sound rate) how much you want.
Plus, You can repeat from where you want, So it will be more efficient practice to you!