The Music Speed Changer** app allows you to easily change the playback speed and the pitch (key) of audio in realtime and independently from each other. The app also s video (with zooming), subtitles (e.g. for karaoke), images (e.g. for scores), and text.

Help: http://www.mobwheel.com/apshelp
Demo video: https://www.youtube.com/watch?v=9l82XH9Mk

## Features ##
- Change pitch and tempo (speed, time-stretch) independently and in realtime using time and frequency domain algorithms.
- Create range and position markers.
- Loop and select regions.
- Export/share and import songs with annotations (for instance for for sharing between music teachers and students).
- Playlists.
- Video view* with zoom (for instance to get an exact view on a guitar player's hand).
- Text view with auto scrolling and monospace font (e.g. useful for tabs).
- Subtitles view to show subtitles (for instance for karaoke).
- Image view with zoom (for instance for displaying scores in image format).
- Volume amplification, and simple voice reduction.
- Channel selection (left/right).
- Import various formats including mp3, wav, m4a, ogg, aac, mp4 video,...
- Export modified audio to wav, mp3, m4a, and flac.
- Batch conversion of files.
- Record audio directly in the app.
- Frequency conversion (for instance to 432Hz).

* A fast device is recommended for the best video experience. The recommended video resolution is 720p.
** Old app name: "Audio Pitch and Speed Player".

Use cases: music instrument training by adjusting tempo and pitch to anytune, transcription, karaoke, ...