ZToolkit (Ztk) is a cross-platform GUI toolkit heavily inspired by GTK. It handles events and low level drawing on behalf of the user and provides a high-level API for managing the UI and custom widgets. ZToolkit is written in C and was created to be used for building audio plugin UIs, where the dependencies often need to be kept to a minimum.

Autotalent is a LADSPA plugin for real-time pitch-correction. Among its controls are allowable notes, strength of correction, LFO for vibrato and formant warp.

This package provides an encoder for the LDAC high-resolution Bluetooth audio streaming codec for streaming at up to 990 kbps at 24 bit/96 kHz.

libaudec is a wrapper library over ffmpeg, sndfile and libsamplerate for reading and resampling audio files, based on Robin Gareus' audio_decoder code.

Tao is a software package for sound synthesis using physical models. It provides a virtual acoustic material constructed from masses and springs which can be used as the basis for building quite complex virtual musical instruments. Tao comes with a synthesis language for creating and playing instruments and a C++ API for those who would like to use it as an object library.

OpenSLES is a royalty-free, cross-platform, hardware-accelerated audio API tuned for embedded systems. It provides a standardized, high-performance, low-latency method to access audio functionality for developers of native applications on embedded mobile multimedia devices, enabling straightforward cross-platform deployment of hardware and software audio capabilities, reducing implementation effort, and promoting the market for advanced audio.

Libltc is a POSIX-C Library for handling Linear/Longitudinal Time Code (LTC) data.

RaySession is a session manager for audio programs such as Ardour, Carla, QTractor, Guitarix, Patroneo, Jack Mixer, etc. The principle is to load together audio programs, then be able to save or close all documents together. Its main purpose is to manage NSM compatible programs, but it also helps for other programs. It offers a patchbay for visualizing and editing connections.

OpenAL provides capabilities for playing audio in a virtual 3D environment. Distance attenuation, doppler shift, and directional sound emitters are among the features handled by the API. More advanced effects, including air absorption, occlusion, and environmental reverb, are available through the EFX extension. It also facilitates streaming audio, multi-channel buffers, and audio capture.

Cubeb is Mozilla's cross-platform audio library.

This package provides a command-line AAC-encoder.

WebRTC-Audio-Processing library based on Google's implementation of WebRTC.

midicomp can manipulate SMF (Standard MIDI File) files. It can both read and write SMF files in 0 or format 1 and also read and write its own plain text format. This means a SMF file can be turned into easily parseable text, edited with any text editor or filtered through any script language, and recompiled back into a binary SMF file.

The Bauer stereophonic-to-binaural DSP (bs2b) library and plugins is designed to improve headphone listening of stereo audio records. Recommended for headphone prolonged listening to disable superstereo fatigue without essential distortions. This package contains a LADSPA plugin for use with applications that support them (e.g. PulseAudio).

Snd is a sound editor modelled loosely after Emacs. It can be customized and extended using either the s7 Scheme implementation (included in the Snd sources), Ruby, or Forth.

ALURE is a utility library to help manage common tasks with OpenAL applications. This includes device enumeration and initialization, file loading, and streaming.

Pyliblo is a Python wrapper for the liblo Open Sound Control (OSC) library. It supports almost the complete functionality of liblo, allowing you to send and receive OSC messages using a nice and simple Python API. Also included are the command line utilities send_osc and dump_osc.

LADSPA is a standard that allows software audio processors and effects to be plugged into a wide range of audio synthesis and recording packages.

Sratom is a library for serialising LV2 atoms to/from RDF, particularly the Turtle syntax.

This package contains wrappers for accessing the ALSA API from Python. It is currently fairly complete for PCM devices, and has some support for mixers.

Pyliblo is a Python wrapper for the liblo Open Sound Control (OSC) library. It supports almost the complete functionality of liblo, allowing you to send and receive OSC messages using a nice and simple Python API. Also included are the command line utilities send_osc and dump_osc.

cyanrip is a command line tool for ripping CDs. It uses MusicBrainz to name and tag each track, and to download and embed cover art. cyanrip supports encoding tracks to multiple formats in parallel and automatically verifies checksums.

mp3guessenc is a command line utility that tries to detect the encoder used for an MPEG Layer III (MP3) file, as well as scan any MPEG audio file (any layer) and print a lot of useful information.

This package provides Steve Harris's LADSPA plugins.