Proton Audio
Time Stretch

Beta version - Preview

Proton Audio Time Stretch (or simply Proton) is a desktop application for Windows and Mac OS that does only one thing: time stretching audio files.

Proton is fast, and free of charge. It's time-stretching algorithm is a simplified version of the commercial Quantum Audio Time Stretch software.

Features

Time stretch any music, track, speech or sound by any amount between 8 times slower and 8 times faster.
Fast audio time stretching with many transformation settings:
- Quality: Fast processing or high quality
- Mode: Poly, Solo or Smooth (slow).
- Transient detection (on/off) and sensitivity (between 0.0 and 1.0).
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, M4A (AAC and ALAC) and OPUS files.
Support sampling rates from 32 kHz to 192 kHz.
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.
Transient detection, with an adjustable transient sensitivity setting.
Transform multiple audio files simultaneously on multi-core computers.
Preserve common metadata such as Title, Artist, Album, etc.
Integrated mini player to preview the result before it is fully transformed.

Download the beta version

Version 0.0.2 (beta):

Windows (64-bit)

Mac OS

Download an alternative version

The following versions of Proton are available for alternative operating systems.
They have not been extensively tested, and no support is provided for them. Use them at your own risks.

Not officially supported - use at your own risks
Linux (generic)	Windows (32-bit)	Windows ARM64	Generic (Java)

Source Code

Here you can download the source code of the time-stretching algorithm, licensed under the Eclipse Public License. Note that only the time-stretching algorithm itself is open source, not the rest of the application (GUI, command-line, etc). The binary and installer are CC-BY-ND, and their source code is proprietary.

Screenshots

Click on an image to zoom it in and out.

Main window + advanced settings dialog, in one of the dark themes

More information

Read the Online Documentation.

Read the FAQ (Frequently Asked Questions) part of the online documentation.

Proton Audio Time Stretch

Beta version - Preview

Tachyon Sonics Home Page

Proton Audio
Time Stretch