reaper_ambix – read/write .ambix files - lossless and lossy Ambisonic compression, loudness normalization, ...

Tue, 01 Sep 2026 12:00:00 +0200

reaper_ambix is a free extension for the REAPER DAW that reads and writes .ambix files – the Ambisonics exchange format (C. Nachbar, F. Zotter, E. Deleflie, A. Sontacchi, ambiX – A Suggested Ambisonics Format, Ambisonics Symposium, Lexington, 2011) that goes with the ambiX plug-ins – and adds a few tools for working with Ambisonic sessions. I started it in 2014 and recently gave it a major update.

.ambix as render format and media type

Files can be written as uncompressed CAF, lossless WavPack, or lossy WavPack in hybrid mode at 6, 4 or 3 bits per sample. The noise floor of the lossy mode follows each channel’s level, so the quiet higher-order channels stay quiet and the result survives decoding and rotation.

Reaper libsndfile wrapper – allows to READ and WRITE more audio formats (eg. .paf, .mat, …)

Sun, 17 Apr 2016 14:00:23 +0200

reaper_libsndfilewrapper adds import and export capabilites (reading/writing soundfiles) to the Digital Audio Workstation Reaper (www.reaper.fm) such as RF64 (eg. used by RME Digicheck, mh acoustics Eigenstudio®), .paf, .sf, .raw, …

Complete list of additionally supported file extensions: .au, .avr, .caf, .htk, .iff, .mat, .mpc, .oga, .paf, .pvf, .raw, .rf64, .sd2, .sds, .sf, .voc, .w64, .wve, .xi

Binaries download (easy to use installers)

Updated releases are provided here: https://github.com/kronihias/reaper_libsndfilewrapper/releases

Old:
Windows 32 bit: reaper_libsndfilewrapper_win32
Windows 64 bit: reaper_libsndfilewrapper_win64
MacOSX (32/64 bit): reaper_libsndfilewrapper_osx

How-to:
Install the plugin and drag/drop former not-recognized audio files into the Reaper session.
In the Render dialog choose Output format: libsndfile and the wanted format. Be aware that not all formats support arbitrary channel counts!

**Source code: **https://github.com/kronihias/reaper_libsndfilewrapper

This software is licensed under the GNU LESSER GENERAL PUBLIC LICENSE (LGPL) license.
It uses libsndfile by Erik de Castro Lopo which is licensed under LGPL
http://www.mega-nerd.com/libsndfile/

LGPL on Matthias Kronlachner

reaper_ambix – read/write .ambix files - lossless and lossy Ambisonic compression, loudness normalization, ...

.ambix as render format and media type

Reaper libsndfile wrapper – allows to READ and WRITE more audio formats (eg. .paf, .mat, …)