MicDroid — Open Source Media Player App

Produces the pitch correction effect made famous by T-Pain. It's based on the AutoTalent pitch-correcting LADSPA plugin, by Tom Baran. There isn't an integrated audio player so you might want to install an audio player that can handle files, such as https://f-droid.org/packages/com.android.music or https://f-droid.org/packages/net.avs234. A proprietary ad library was removed.