MidiQuickFix allows you to directly edit the events in a Midi file. It is intended to make it easy to find and fix problems, such as setting volume and pan values for a track, without the need for a complex Midi sequencing program.

MidiQuickFix allows you to directly edit the events in a Midi file. It is intended to make it easy to find and fix problems, such as setting volume and pan values for a track, without the need for a complex Midi sequencing program.

Features:
- Most audio formats supported: MP3, FLAC, OGG, WMA, AIFF, etc.
- Gapless playback
- Tags & Cover Art support
- Keyboard shortcuts
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.
TiMidity++ is a free software, distributed under the terms of GNU general public license.
Features:
timidity.sourceforge.net
- Plays MIDI files without any external MIDI instruments at all
- Understands SMF, MOD, RCP/R36/G18/G36, MFI
- Converts MIDI files into various audio file formats: .wav, .au, .aiff, .ogg and so on
- Uses Gravis Ultrasound compatible patch files and/or SoundFonts as the voice data
- Displays information about the music that is now playing
- Various user interfaces: ncurses, gtk, Win32-GUI, and others
- Plays remote MIDI files over the network
- Plays MIDI files in archive files
- Displays sound spectrogram for the playing music
- Trace playing
sourceforge.net/projects/timidity
Minimalist local music player for windows, transparent, borderless and buttonless.
Features:
- Portable, free, open-source software. (Delphi, MIT open-source license)
- Operating System: Windows XP/7/8/10, 简体 / 繁體 / English / Unicode
- Minimalist, transparent, “no interface, only music”.
- Optimized for local lossless music playback. Powered by Bass library, with excellent performance and high quality sound effects. Modular design, can be highly customized.
- Supports lightweight media library, lyrics and visual effects. Can be minimized to the system tray, takes very few system resources, suitable to listening to music when working.
- These features come from user suggestions: tag editing, automatic switching list, play queue, mouse gestures, equalizer, audio device selection, the global volume wheel (over systray), font settings, minimalist mode, mouse transparent, pin to desktop and a simple layout.
- Supports APE / FLAC / WavPack / MP3 / OGG / TTA / TAK / Musepack / AAC / AC3 / WMA / Wav / CD / ALAC / Aiff / MOD / CUE (almost all local music formats from lossy to lossless, and supports video formats by plug-in)

With TuxGuitar, you will be able to compose music using the following features:
- Tablature editor
- Score Viewer
- Multitrack display
- Auto Scroll while playing
- Note duration management
- Various effects (bend, slide, vibrato, hammer-on/pull-off)
- Support for triplets (5,6,7,9,10,11,12)
- Repeat open and close
- Time signature management
- Tempo management
- Imports and exports gp3,gp4 and gp5 files

Audio Utility is a free, lightweight, universal general purpose all in one digital channel strip VST plugin offering precise controls over various aspects of an audio signal, from mid/side processing to soft clipping.
Features include:
- input routing with separate pans for the left and right channels, or alternatively a pre mono balance control to decide how the left and right channels are blended for conversion into mono
- gain, and individual left and right channel gains, mutes
- pan and phase inversion of either channel
- width control, along with separate mid and side gain sliders and mutes
- maximally flat minimal phase high and low pass 12db/octave filtering
- optional hard and soft clipping at 0db
- everything is fully automatable with sensible parameter ranges/scaling

Decibel Audio Player is a GTK+ open-source (GPL) audio player for GNU/Linux. It is very straightforward to use thanks to a clean and user-friendly interface. It is especially targeted at Gnome and follows the Gnome HIG.
Decibel Audio Player is built around a highly modular structure that lets the user disable completely the features he does not need. A disabled feature uses absolutely no memory and no processor time.
Decibel Audio Player is a real audio player and does not include features that are not meant to be part of an audio player. These features, such as tagging files or burning CDs, generally have a better support in dedicated software. If you are looking for an audio player that can make coffee, then you should stay away from Decibel and give a try to other players (e.g., Amarok, Exaile).
StudioFactory provides a complete virtual audio studio on your computer. It has a very powerful virtual analog modular synthesizer based on an improved version of the SynFactory synthesis engine. StudioFactory is fully compatible with SynFactory and can load all existing patch files. The synthesis engine is extended with additional modules that give access to MIDI and audio input. This makes it possible to play sounds generated by StudioFactory with an external MIDI-keyboard. With the audio input StudioFactory can be used as an standalone effect processor and provides reverb, echo and vocoder effects.

Canorus is a free cross-platform music score editor. It supports an unlimited number and length of staffs, polyphony, a MIDI playback of notes, chord markings, lyrics and import/export filters to formats like MIDI, MusicXML, ABC Music, MusiXTeX and LilyPond.

sourceforge.net/projects/canorus
github.com/canorusmusic/canorus
An intuitive mp3-player with many functions. It is portable and runs without installation – just download, unzip, run. Without permission, Nemp doesn’t fiddle with your mp3 files either, but leaves them as they are.
(“Noch ein mp3-Player” translates to “Yet another mp3-player”.)

Columns UI is an alternative skinnable user interface for the Foobar2000 audio player.

github.com/reupen/columns_ui
yuo.be/columns
yuo.be/wiki/columns_ui:manual
Hydrogen Audio Forum
Advanced CUI Themes:
EOLE ~ github.com/Ottodix/Eole-foobar-theme
Georgia ~ hydrogenaud.io/index.php?topic=116190.0
CUI Components:
foobar2000.org/components/view/foo_uie_tagger_mod
foobar2000.org/components/view/foo_youtube
github.com/reupen/console_panel
EOF