pyroomacoustics is a framework for simulating the acustic behaviour of rooms, such as computing the impulse response using different simulation methods.

This is an open-source re-implementation of the NullSoft Expression Evaluation Library 2, as used in the Milkdrop music visualizer.

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.

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.

The LV2 Toolkit (LVTK) contains libraries that wrap the LV2 C API and extensions into easy to use C++ classes. It is the successor of lv2-c++-tools.

Game-music-emu is a collection of video game music file emulators that support the following formats and systems:

AY

ZX Spectrum/Asmtrad CPC

GBS

Nintendo Game Boy

GYM

Sega Genesis/Mega Drive

HES

NEC TurboGrafx-16/PC Engine

KSS

MSX Home Computer/other Z80 systems (doesn't support FM sound)

NSF/NSFE

Nintendo NES/Famicom (with VRC 6, Namco 106, and FME-7 sound)

SAP

Atari systems using POKEY sound chip

SPC

Super Nintendo/Super Famicom

VGM/VGZ

Sega Master System/Mark III, Sega Genesis/Mega Drive, BBC Micro

Vamp is an audio processing plugin system for plugins that extract descriptive information from audio data — typically referred to as audio analysis plugins or audio feature extraction plugins.

MDA-LV2 is an LV2 port of the MDA plugins. It includes effects and a few instrument plugins.

r128gain is a multi platform command line tool to scan your audio files and tag them with loudness metadata (ReplayGain v2 or Opus R128 gain format), to allow playback of several tracks or albums at a similar loudness level. r128gain can also be used as a Python module from other Python projects to scan and/or tag audio files.

Rubber Band is a library and utility program that permits changing the tempo and pitch of an audio recording independently of one another.

rtcqs analyzes a Linux system to detect possible bottlenecks that could have a negative impact on real-time audio performance. It checks kernel configuration, IRQ priorities, CPU governor, swappiness, and other settings relevant to low-latency audio work.

libmt32emu is a C/C++ library which approximately emulates the Roland MT-32, CM-32L and LAPC-I synthesizer modules. It is part of the Munt project.

libfreeaptx is an implementation of the Audio Processing Technology codecs aptX and aptX HD, mainly intended for use with an A2DP bluetooth profile.

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

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

OpenCore-AMR is a library of OpenCORE Framework implementation of Adaptive Multi Rate Narrowband and Wideband (AMR-NB and AMR-WB) speech codec.

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.

Python-SoXR is a Python wrapper of libsoxr, a high quality, one-dimensional sample-rate conversion library.

LibOpenMPT is a cross-platform C++ and C module playback library. It is based on the player code of the Open ModPlug Tracker project.

The SoX Resampler library (libsoxr) performs one-dimensional sample-rate conversion. It may be used, for example, to resample PCM-encoded audio.

Calf Studio Gear is an audio plug-in pack for LV2 and JACK environments. The suite contains lots of effects (delay, modulation, signal processing, filters, equalizers, dynamics, distortion and mastering effects), instruments (SF2 player, organ simulator and a monophonic synthesizer) and tools (analyzer, mono/stereo tools, crossovers).

RtMidi is a set of C++ classes (RtMidiIn, RtMidiOut, and API specific classes) that provide a common cross-platform API for realtime MIDI input/output.

Snapcast is a multi-room client-server audio player. Clients are time synchronized with the server to play synced audio.

Guitarix is a virtual guitar amplifier running JACK. Guitarix takes the signal from your guitar as a mono-signal from your sound card. The input is processed by a main amp and a rack-section. Both can be routed separately and deliver a processed stereo-signal via JACK. You may fill the rack with effects from more than 25 built-in modules including stuff from a simple noise gate to modulation effects like flanger, phaser or auto-wah.