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.

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

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
Aria Maestosa is a midi sequencer / 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.

sourceforge.net/projects/ariamaestosa
github.com/ariamaestosa/ariamaestosa
Hya.Wave is a basic online audio editor that allows you to edit audio from any web browser. Hya.Wave allows you to edit web samples, features real-time FX, load and store in the cloud, undo/redo, audio wave exploration and cut, paste & crops.
hya.io/wave
wav.hya.io/#/fx (old site)
www.facebook.com/hya.io
twitter.com/hya_io
Hya Wave Online Audio Editor Quick Tips with Kyle
WaveShop is a free, open-source audio editor for Windows XP/Vista/7/8 32-bit and 64-bit. WaveShop is fast, lightweight, and bit-perfect, meaning samples aren’t altered unless they need to be. Editing a portion of an audio file only affects that portion; the rest of the file is untouched. Blocks of audio can be cut and pasted without changing their contents at all. This is especially useful for patching a finished master without corrupting its dither. Waveshop’s features include peak, RMS and spectral analysis, normalizing, fading, sample rate conversion, audio generation, plug-ins, and more, all with unlimited undo and comprehensive help.

waveshop.sourceforge.net/
sourceforge.net/projects/waveshop/
puddletag is an audio tag editor (primarily created) for GNU/Linux similar to the Windows program, Mp3tag. Unlike most taggers for GNU/Linux, it uses a spreadsheet-like layout so that all the tags you want to edit by hand are visible and easily editable.
The usual tag editor features are supported like extracting tag information from filenames, renaming files based on their tags by using patterns and basic tag editing.
Then there are Functions, which can do things like replace text, trim it, do case conversions, etc. Actions can automate repetitive tasks. Doing web lookups using Amazon (including cover art), Discogs (does cover art too!), FreeDB and MusicBrainz is also supported. There’s quite a bit more, but I’ve reached my comma quota.
Supported formats: ID3v1, ID3v2 (mp3), MP4 (mp4, m4a, etc.), Vorbis Comments (ogg, flac), Musepack (mpc), Monkey’s Audio (.ape) and WavPack (wv).

Jokosher is a simple and powerful multi-track studio. Jokosher provides a complete application for recording, editing, mixing and exporting audio, and has been specifically designed with usability in mind. The developers behind Jokosher have re-thought audio production at every level, and created something devilishly simple to use.

TimeStretch Player is a free online audio player that allows you to loop, speed up, slow down and pitch shift sections of an audio file. This makes it a great tool for practicing or transcribing music.
Planet CCRMA at Home is a (large) collection of free, open source software packages that you can add to a computer running Fedora 22, 23 or 24 or CentOS 5 to transform it into an audio/video oriented workstation. Here at Stanford University CCRMA we use a consistent and well defined Linux environment for our daily work in audio and computer music and research. With the Planet CCRMA at Home package collection, you can easily install most of that environment on your own Linux system. Planet CCRMA is easy to install and maintain, it can also be installed and upgraded over the network from the Planet CCRMA repositories or its mirrors.
WaveSurfer is an open source tool for sound visualization and manipulation. Typical applications are speech / sound analysis and sound annotation / transcription. WaveSurfer may be extended by plug-ins as well as embedded in other applications.
Features:
- Customizable – users can create their own configurations. Localization support.
- Extensible – new functionality can be added through a plugin architecture.
- Embeddable – WaveSurfer can be used as a widget in custom applications.
- Transcription file formats – reads, and writes HTK (and MLF), TIMIT, ESPS/Waves+, and Phondat. Support for encodings and Unicode.
- Multi-platform – Linux, OSX & Windows.

sourceforge.net/projects/wavesurfer
en.wikipedia.org/wiki/WaveSurfer
Sweep is an audio editor and live playback tool for GNU/Linux, BSD and compatible systems. It supports many music and voice formats including WAV, AIFF, Ogg Vorbis, Speex and mp3, with multichannel editing and LADSPA effects plugins.
