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: learning and practicing guitar and other music instruments, transcriptions, change the speed of audiobooks, language learning...

Features:
- Change pitch and tempo (speed, time-stretch) independently.
- Support for up to +/- 24 semi-tones.
- Loop region.
- Select region using sliders and indirect input (ms).
- Filtering.
- Import various formats including mp3, wav, ogg, flac, ... *
- Record samples directly in MSC and change the speed and pitch of the recordings.*
- Volume amplification.
- Download music files from OneDrive.com (SkyDrive) (stored in folder "MSC"). *
- Upload and manage files to Music Speed Changer via Wifi/WLAN. *
- Play left/right channels separately (e.g. for duet training). *
- Voice/Vocals reduction: reduce vocals so that only music is audible (does not work with all audio recordings!). *
- Formats not supported by MSC can be converted to MP3 with this free converter: http://mp3.conversion-tool.com/
- MIDI audio files can be converted to MP3 with this free tool: http://midi.conversion-tool.com/
- *NEW* Support for Windows Phone 8.1 file pickers*.

* These features are available in the full version only.

Music Speed Changer website: http://www.tequnique.com/msc
Questions, ideas, feedback? Just drop us a line using the email address or contact form on http://www.tequnique.com/contact

Note: Extreme pitch and tempo changes (for instance 24 semi-tones, which is quite a lot!) can lead to noise.