App: Quantum Audio Time Stretch
Developer: Nicolas Juillerat
Genres: Music, Productivity

This application allows you to load audio files, and to create a new versions in which the playback speed is changed (time stretching), without affecting the pitch. It is targeted to professional and semi-professional audio/music designers who need a high quality and fast audio time stretching application in their toolbox.

Features:

- Time stretch any music, track, speech or sound by any amount between 4 times slower and 4 times faster.
- The time stretching factor can be specified in many ways: length change, speed change, length from/to, tempo from/to, video FPS from/to, etc.
- Five quality settings:
  - 1 and 2 for quick previews or speech.
  - 3 (default) for the best trade-off between quality and speed. Faster than real-time on most computers.
  - 4 and 5 for the more demanding sources. Quality 5 may not run in real-time on all computers and is designed for offline processing.
- Use a modern audio time stretching algorithm with transient detection and a transient sensitivity setting.
- Support mono, stereo and multi-channel (5.1, 7.1) audio files. Fully preserve the stereo / spatial field.
- Load and save WAVE (*.wav), AIFF/AIFC (*.aiff, *.aifc) and AU Sun/NeXT (*.au) audio files, in PCM 16-bit / 24-bit integer, or in 32-bit IEEE floating point format. Also load FLAC, OGG, MP3 and M4A files.
- Support sampling rates from 32 kHz to 192 kHz.
- Transform multiple audio files simultaneously on multi-core computers.
- Integrated mini player to preview the result before it is fully transformed.

Release notes:
- Support for .wav files of more than 4 GB using the "RF64" extension
- Support for loading .opus and M4A/ALAC files
- Faster loading of most .mp3, .m4a, and .ogg files
- Bugfixes