This app is an audio player that can change the speed and the pitch of audio contents.  
The app is useful for music dictation, music practice ( guitar / bass / vocal ), dance lesson, language study , and listening to long audio  etc.
You could use this app as an audiobook player and as a radio player.

Features
- Audio speed change. ( 0.25x - 4.0x )
  * This apps can change audio speed without pitch shifting.
- Pitch shifting ( -1 octave to +1 octave , adjustable per cent level ) 
- Advanced audio control designed for long audio track.
  Multiple seek bars provides more control of seeking long audio.
- Marking feature in audio track. 
 You could put marks on anywhere in audio track. You can play the audio from the position where you marked repeatedly. And the mark can be named.

 The following features are unlocked by upgrading to Pro version.(It isn't free. In app purchase. During the first two weeks after installation, all of these features are available for your use as a trial period.).
  - Widgets
  - Playing playlist
  - Search songs / albums / artists
  - Shuffle play
  - Sleep timer
  - Silence detection
  - Remove ads

This music player is a good application for listening to a part of the music repeatedly . ( Ex. Music dictation / Music practice for guitar, bass, vocal etc. )
Also the app is good for listening the audio faster ( Ex. audiobook,  radio ) or slower( Ex. language study ).

The app for speed change and pitch shifting of audio.