Zrythm is a digital audio workstation designed to be featureful and easy to use. It offers unlimited automation options, LV2 plugin support, JACK support and chord assistance.

opustags is an Ogg Opus tag editor. It reads and edits the comment header of an Ogg Opus audio file, offering both read-only and editing modes. Tags can be edited interactively with an editor of your choice.

Qtractor is an Audio/MIDI multi-track sequencer application. It uses JACK for audio and ALSA sequencer for MIDI as multimedia infrastructures and follows a traditional multi-track tape recorder control paradigm.

LibSMF is a C library for handling SMF ("*.mid") files. It transparently handles conversions between time and pulses, tempo map handling and more. Full API documentation and examples are included.

Aria Maestosa is a MIDI sequencer and editor. It lets you compose, edit and play MIDI files with a few clicks in a user-friendly interface offering score, keyboard, guitar, drum and controller views.

GSequencer allows you to play, capture and create music. There is a piano roll, automation and wave form editor. It has machines for playing drum samples, Soundfont2 sound containers and synthesizers. They usually can be connected to a MIDI input source (instrument). It has support for various audio backends like ALSA, Pulseaudio, JACK, OSSv4 and CoreAudio.

A Python interface to Last.fm and other API-compatible websites such as Libre.fm.

This package provides a multi-channel MIDI step sequencer LV2 plugin with a selectable pattern matrix size.

setBfree is a MIDI-controlled, software synthesizer designed to imitate the sound and properties of the electromechanical organs and sound modification devices that brought world-wide fame to the names and products of Laurens Hammond and Don Leslie.

Libgig is a C++ library for loading, modifying existing and creating new Gigasampler (.gig) files and DLS (Downloadable Sounds) Level 1/2 files, KORG sample based instruments (.KSF and .KMP files), SoundFont v2 (.sf2) files and AKAI sampler data. The package includes a couple of command line tools based on the library.

Geonkick is a synthesizer that can synthesize elements of percussion such as kicks, snares, hit-hats, shakers, claps and sticks. It can also play and mix samples.

isrcsubmit is a tool to extract International Standard Recording Code (ISRCs) from audio CDs and submit them to MusicBrainz.

GNU LilyPond is a music typesetter, which produces high-quality sheet music. Music is input in a text file containing control sequences which are interpreted by LilyPond to produce the final document. It is extendable with Guile.

PianoBooster is a MIDI file player that displays the musical notes and teaches you how to play the piano. The difference between playing along to a CD or a standard MIDI file is that Piano Booster listens and reacts to what you are playing on a MIDI piano keyboard. You can play along to any track in the MIDI file and Piano Booster will follow your playing.

MuseScore is a music score typesetter. Its main purpose is the creation of high-quality engraved musical scores in a WYSIWYG environment.

It supports unlimited staves, linked parts and part extraction, tablature, MIDI input, percussion notation, cross-staff beaming, automatic transposition, lyrics (multiple verses), fretboard diagrams, and in general everything commonly used in sheet music. Style options and style sheets to change the appearance and layout are provided.

MuseScore can also play back scores through the built-in sequencer and SoundFont sample library.

This package provides the LV2 plugin "GxSuppaToneBender", a simulation modelled after the Vox Suppa Tone Bender pedal.

QMidiArp is an advanced MIDI arpeggiator, programmable step sequencer and LFO. It can hold any number of arpeggiator, sequencer, or LFO modules running in parallel.

This package provides the LV2 plugin "GxSuperFuzz", an analog simulation of the UniVox SuperFuzz pedal. In this simulation the trim pot, which is usually in the housing, is exposed as a control parameter. It adjusts the amount of harmonics.

AVLdrums is a drum sample player LV2 plugin dedicated to Glen MacArthur's AVLdrums. This plugin provides a convenient way to sequence and mix MIDI drums and comes as two separate drumkits: Black Pearl and Red Zeppelin.

This plugin for beets automatically obtains tag data from https://bandcamp.com/. It's also capable of getting song lyrics and album art using the beets FetchArt plugin.

Bristol is an emulation package for a number of different classic synthesizers including additive and subtractive and a few organs. The application consists of the engine, which is called bristol, and its own GUI library called brighton that represents all the emulations. There are currently more than twenty different emulations; each does sound different although the author maintains that the quality and accuracy of each emulation is subjective.

Yoshimi is a fork of ZynAddSubFX, a feature-heavy real-time software synthesizer. It offers three synthesizer engines, multitimbral and polyphonic synths, microtonal capabilities, custom envelopes, effects, etc. Yoshimi improves on support for JACK features, such as JACK MIDI.

This package provides an Emacs major mode for editing GNU LilyPond music scores.

This package provides the LV2 plugin "GxHyperion", a simulation of the Hyperion Fuzz pedal.