RNNoise is a library that uses deep learning to apply noise suppression to audio sources with voice presence. This package provides an LV2 audio plugin.

Qsynth is a GUI front-end application for the FluidSynth SoundFont synthesizer written in C++.

WildMIDI is a simple software midi player which has a core softsynth library that can be used with other applications.

FDK is a library for encoding and decoding Advanced Audio Coding (AAC) format audio, developed by Fraunhofer IIS, and included as part of Android. It supports several Audio Object Types including MPEG-2 and MPEG-4 AAC LC, HE-AAC (AAC LC + SBR), HE-AACv2 (LC + SBR + PS) as well AAC-LD (low delay) and AAC-ELD (enhanced low delay) for real-time communication. The encoding library supports sample rates up to 96 kHz and up to eight channels (7.1 surround).

lv2lint is an LV2 lint-like tool that checks whether a given plugin and its UI(s) match up with the provided metadata and adhere to well-known best practices.

SuperCollider is a synthesis engine (scsynth or supernova) and programming language (sclang). It can be used for experimenting with sound synthesis and algorithmic composition.

SuperCollider requires jackd to be installed in your user profile and your user must be allowed to access the realtime features of the kernel. Search for "realtime" in the index of the Guix manual to learn how to achieve this using Guix System.

This is a simple Milkdrop-like music visualizer that uses the projectM library to visualize audio input.

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

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.

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.

Libxmp is a library that renders module files to PCM data. It supports over 90 mainstream and obscure module formats including Protracker (MOD), Scream Tracker 3 (S3M), Fast Tracker II (XM), and Impulse Tracker (IT).

This C++ library implements the Butterworth, RBJ, and Chebychev IIR filters. Samples are processed one by one, in real time. It can easily import coefficients generated with Python (scipy). It also avoids memory leaks by allocating memory at compile time, using templates, instead of calling malloc() or new.

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.

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

This package provides pythonic libsndfile wrapper to read and write audio files.

qpwgraph is a graph manager dedicated to PipeWire, using the Qt C++ framework. It provides a visual interface to audio and video connections managed by PipeWire.

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

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.

PortAudio is a portable C/C++ audio I/O library providing a simple API to record and/or play sound using a callback function or a blocking read/write interface.

libsoundio is a C library providing audio input and output. The API is suitable for real-time software such as digital audio workstations as well as consumer software such as music players.

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

libebur128 is a C library that implements the EBU R 128 standard for loudness normalisation.

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.

shntool is a multi-purpose WAVE data processing and reporting utility. File formats are abstracted from its core, so it can process any file that contains WAVE data, compressed or not---provided there exists a format module to handle that particular file type. It can also generate CUE files, and use them split WAVE data into multiple files.