Music21 is a set of tools for helping scholars and other active listeners answer questions about music quickly and simply.

MusE is a MIDI/Audio sequencer with recording and editing capabilities. Its audio sequencer supports the LADSPA, DSSI, and LV2 audio plugin formats; the MIDI sequencer provides a piano roll, a drum editor, a list view, and a score editor. MusE aims to be a complete multitrack virtual studio.

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.

The purpose of beets is to get your music collection right once and for all. It catalogs your collection, automatically improving its metadata as it goes using the MusicBrainz database. Then it provides a variety of tools for manipulating and accessing your music.

Sfizz provides an SFZ parser and synth C++ library. It includes LV2 plugins and a JACK standalone client.

A semi-modular software synthesizer and fx plugin

This package provides the Rakarrack effects as LV2 plugins. The ports are done such that hopefully when Rakarrack gets an active maintainer these will get merged into the original project.

DUMB is a tracker library with support for IT, XM, S3M and MOD files. It targets maximum accuracy to the original formats, with low-pass resonant filters for the IT files, accurate timing and pitching, and three resampling quality settings (aliasing, linear interpolation and cubic interpolation).

Seq24 is a real-time MIDI sequencer. It was created to provide a very simple interface for editing and playing MIDI loops.

QMidiRoute is a MIDI event router and filter. MIDI note, control change, program change and pitch bend events are logged, and can be filtered, redirected and transformed into other events according to MIDI maps defined as tabs in the main control surface.

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.

Wolf Spectrum is a real-time 2D spectrogram plugin. It is provided as an LV2 plugin and as a standalone Jack application.

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.

mididings is a MIDI router/processor based on Python, supporting ALSA and JACK MIDI. Features include:

• MIDI routing and filtering; filter events depending on their event type, channel, note number, velocity, etc., and freely route them between an arbitrary number of input and output ports.

• Modifying and converting MIDI events; transpose notes, apply velocity curves, change controller values and ranges, or convert events to any other MIDI event type. mididings also includes more complex functions like a diatonic harmonizer, floating split points, latched notes, and more.

• Seamless switching between patches; set up different "scenes", each with its own MIDI routing and processing, and switch between them at any time, even while playing. Switching scenes does not affect notes already held, and does not result in dropouts or stuck notes!

• MIDI event monitoring, running external commands; print MIDI event data to the console to help debugging your patches and configuring your MIDI controllers. In addition to its MIDI output, mididings can also execute shell commands and send OSC or DBUS messages.

Quod Libet provides several ways to browse and view your local music library, along with flexible search capabilities. It includes a tag editor, which can also be invoked as a standalone program, and further supports streaming audio and feeds (such as podcasts).

Fluida is an audio plugin in the LV2 format that acts as a frontend for fluidsynth.

Regrader is a delay effect where the repeats degrade in resolution. This is an unofficial port of the Regrader plugin created by Igorski. It is available as an LV2 plugin and a standalone JACK application.

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

Fogpad is a reverb effect in which the reflections can be frozen, filtered, pitch shifted and ultimately disintegrated. This is an unofficial port of the Regrader plugin created by Igorski. It is available as an LV2 plugin and a standalone JACK application.

abjad-ext-rmakers includes a collection of classes for creating and and manipulating rhythms such as accelerandi, taleas, and more.

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.

The Non Session Manager is an API and an implementation for audio session management. NSM clients use a well-specified OSC protocol to communicate with the session management daemon.

This package provides the LV2 plugin "GxVoodooFuzz", a simulation modelled after the Voodoo Lab SuperFuzz pedal. It's basically a Bosstone circuit, followed by the tone control of the FoxToneMachine in parallel with a DarkBooster, followed by a volume control.

This set of LV2 plugins is a port of the internal modules found in Alsa Modular Synth. These plugins are used to create modular synthesizers and contain: VCO, VCF, VCA, LFO, slew limiter, envelopes, sample and hold, etc.