Music Speed Changer changes audio tempo (speed) and pitch in realtime quick and easy. Just select an audio file, mark the region you want to play (and loop/repeat) and change tempo and pitch on the fly.
Use cases of Music Speed Changer are for instance: practicing guitar and other music instruments, transcriptions, change the speed of audiobooks, language learning...

Features:
- Change pitch and tempo (speed, time-stretch) independently.
- Loop region
- Select region
- Import various formats including mp3, wav, m4a, ogg, aac, ...


Features of the full version:
- Available here: https://play.google.com/store/apps/details?id=com.teapps.musicspeedchanger
- HQ audio output
- Support for arbitrary pitch (even deviating from semi-tones)
- Filtering
- Export to wav and mp3
- Volume amplification
- Channel selection
- Ad free

Questions, ideas, feedback? Contact us here: http://www.mobwheel.com/contact