This project is a rebirth of a direct integration between Bluez and ALSA. Since Bluez >= 5, the built-in integration has been removed in favor of 3rd party audio applications. From now on, Bluez acts as a middleware between an audio application, which implements Bluetooth audio profile, and a Bluetooth audio device. BlueALSA registers all known Bluetooth audio profiles in Bluez, so in theory every Bluetooth device (with audio capabilities) can be connected. In order to access the audio stream, one has to connect to the ALSA PCM device called bluealsa. The device is based on the ALSA software PCM plugin.

liblo is a lightweight library that provides an easy to use implementation of the Open Sound Control (OSC) protocol.

Carla is a modular audio plugin host, with features like transport control, automation of parameters via MIDI CC and remote control over OSC. Carla currently supports LADSPA (including LRDF), DSSI, LV2, VST2, and VST3 plugin formats, plus SF2 and SFZ file support. It uses JACK as the default and preferred audio driver but also supports native drivers like ALSA.

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.

Butt is a tool to stream audio to a ShoutCast or Icecast server.

RtOSC is a realtime safe library for handling OSC messages.

LV2 is an open specification for audio plugins and host applications. At its core, LV2 is a simple stable interface, accompanied by extensions which add functionality to support the needs of increasingly powerful audio software.

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.

TiMidity++ is a software synthesizer. It can play MIDI files by converting them into PCM waveform data; give it a MIDI data along with digital instrument data files, then it synthesizes them in real-time, and plays. It can not only play sounds, but also can save the generated waveforms into hard disks as various audio file formats.

EasyEffects is an advanced audio manipulation tool providing a graphical user interface to apply various effects and filters to audio streams using Pipewire. Effects can be applied in real time to audio inputs or outputs such as a microphone to reduce noise or apply many other effects including:

• Auto gain

• Bass enhancer

• Bass loudness

• Compressor

• Convolver

• Crossfeed

• Crystalizer

• De-esser

• Delay

• Echo Canceller

• Equalizer

• Exciter

• Filter (low-pass, high-pass, band-pass and band-reject modes)

• Gate

• Limiter

• Loudness

• Maximizer

• Multiband compressor

• Multiband gate

• Noise reduction

• Pitch

• Reverberation

• Speech Processor

• Stereo tools

Dcadec is a DTS Coherent Acoustics surround sound decoder with support for HD extensions.

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.

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.

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

yabridge is Yet Another way to use Windows audio plugins. It supports using Windows VST2, VST3, and CLAP plugins in plugin hosts as if they were native plugins, with optional support for plugin groups to enable inter-plugin communication for VST2 plugins and quick startup times.

The pa-notify daemon sends notifications about the current volume level of PulseAudio or PipeWire using libnotify.

The LSP DSP library provides a set of functions that perform SIMD-optimized computing on several hardware architectures. All functions currently operate on IEEE-754 single-precision floating-point numbers.

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.

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.

This package provides a conversion utility for LV2 Plugin developers to generate C headers from Turtle files.

Patchage is a modular patch bay for audio and MIDI systems based on JACK and ALSA.

Libmixed is a library for real-time audio processing pipelines for use in audio/video/games. It can serve as a base architecture for complex DSP systems.

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.

FAudio is an XAudio reimplementation that focuses solely on developing fully accurate DirectX Audio runtime libraries.