AZR-3 is a port of the free VST plugin AZR-3. It is a tonewheel organ with drawbars, distortion and rotating speakers. The organ has three sections, two polyphonic sections with nine drawbars each and one monophonic bass section with five drawbars. A standalone JACK application and LV2 plugins are provided.

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 C library provides an encoder and a decoder for the GSM 06.10 RPE-LTP lossy speech compression algorithm.

This package provides a JACK Audio Connection Kit (JACK) client for Python. This variant uses the compatibility JACK implementation provided by Pipewire.

IR is a low-latency, real-time, high performance signal convolver especially for creating reverb effects. It supports impulse responses with 1, 2 or 4 channels, in any soundfile format supported by libsndfile.

Zita convolver is a C++ library providing a real-time convolution engine.

This package provides python bindings for libsndfile based on CFFI and NumPy.

Lilv is a C library to make the use of LV2 plugins as simple as possible for applications. Lilv is the successor to SLV2, rewritten to be significantly faster and have minimal dependencies.

AlsaModularSynth is a digital implementation of a classical analog modular synthesizer system. It uses virtual control voltages to control the parameters of the modules. The control voltages which control the frequency e.g. of the VCO (Voltage Controlled Oscillator) and VCF (Voltage Controlled Filter) modules follow the convention of 1V / Octave.

Codec 2 is a speech codec designed for communications quality speech between 700 and 3200 bit/s. The main application is low bandwidth HF/VHF digital radio.

Audacity is a multi-track audio editor designed for recording, playing and editing digital audio. It features digital effects and spectrum analysis tools.

SoundTouch is an audio processing library for changing the tempo, pitch and playback rates of audio streams or audio files. It is intended for application developers writing sound processing tools that require tempo/pitch control functionality, or just for playing around with the sound effects.

This package contains the resample and windowfilter command line utilities. The resample command allows changing the sampling rate of a sound file, while the windowfilter command allows designing Finite Impulse Response (FIR) filters using the so-called window method.

projectM is an open-source re-implementation of the MilkDrop visualizer. This package contains only the libprojectm library.

This Python module provides bindings for the PortAudio library and a few convenience functions to play and record NumPy arrays containing audio signals.

Control a Jack server. Allows you to plug various sources into various outputs and to start, stop and configure jackd

libInstPatch is a library for processing digital sample based MIDI instrument "patch" files. The types of files libInstPatch supports are used for creating instrument sounds for wavetable synthesis. libInstPatch provides an object framework (based on GObject) to load patch files, which can then be edited, converted, compressed and saved.

Suil is a lightweight C library for loading and wrapping LV2 plugin UIs.

Suil makes it possible to load a UI of a toolkit in a host using another toolkit. The API is designed such that hosts do not need to explicitly support specific toolkits – if Suil supports a particular toolkit, then UIs in that toolkit will work in all hosts that use Suil automatically.

Suil currently supports every combination of Gtk, Qt, and X11.

This package provides various LADSPA plugins. cs_chorus and cs_phaser provide chorus and phaser effects, respectively; mvclpf24 provides four implementations of the low-pass filter used in vintage Moog synthesizers; mvchpf24 is based on the voltage-controlled high-pass filter by Robert Moog. The filters attempt to accurately emulate the non-linear circuit elements of their original analog counterparts.

This package provides Steve Harris's LADSPA plugins.

Copies a stream, skipping everything except MP3 frames with valid headers. This can be used to copy and concatenate streams, even if they contain extra garbage.

Rakarrack is a richly featured multi-effects processor emulating a guitar effects pedalboard. Effects include compressor, expander, noise gate, equalizers, exciter, flangers, chorus, various delay and reverb effects, distortion modules and many more. Most of the effects engine is built from modules found in the excellent software synthesizer ZynAddSubFX. Presets and user interface are optimized for guitar, but Rakarrack processes signals in stereo while it does not apply internal band-limiting filtering, and thus is well suited to all musical instruments and vocals.

VO-AACENC is the VisualOn implementation of Advanced Audio Coding (AAC) encoder.

CLAP stands for CLever Audio Plugin. It is an audio plugin ABI which defines a standard for Digital Audio Workstations and audio plugins to work together.