This software allows “scratching” on digitally sampled audio data (*.wav, *.au, *.ogg, *.mp3, etc.) the way hip hop DJs scratch on vinyl records. It features multiple turntables, realtime effects (built-in as well as LADSPA plugin effects), a sequencer and MIDI interface – all accessible through an easy-to-use gtk+ GUI. This software is designed to run under Linux, FreeBSD and the like.
CheeseTracker is a software sampler and step-based sequencer. It allows a musician to turn single-note samples into instruments capable of covering three or four octaves (by playing the samples at different speeds, resulting in different pitches). In addition, it is possible to take a collection of samples that are recorded at different octaves, and combine them into a single “instrument,” allowing for even more octaves without sampling artifacts.
Using the Pattern Editor, it is possible to compose songs with these instruments that the computer plays automatically. The Pattern Editor allows the user to arrange samples in several independant channels, so that many samples can play simultaneously. These songs, and the samples which comprise their instruments, can be saved together in one-file archives called modules.
CheeseTracker imposes no limits on the length of the samples used. As a result, it can be used as a mixer as well as a sampler/sequencer. Effects such as reverb can be applied to each sample individually, eliminating the need for expensive pedals.
AUBE is a system for sound generation and processing. You can process audio on the fly by setting up arbitrary configurations of sound generators, sequencers and effects modules, through which sound is played, filtered, and recorded.
“Sekaiju” is free, open source MIDI sequencer / editor software for creating and editing MIDI data. You can record MIDI keyboard or synthesizer playing to the computer, and you can compose music to play with your MIDI modules or synthesizers. Since it allows editing of all kinds of events, and has an unlimited undo and redo feature, Sekaiju can also be used as a powerful MIDI editor. A real-time input which can input each MIDI channel messages into separate tracks at the same time is a popular feature .
gmorgan is a rhythm station, a modern organ with full editable accompaniment for play in real time emulating the capabilities of commercial rhythm stations “Korg”,”Roland”, “Solton” … also has a small pattern based sequencer like “Band in a Box”. Uses the capabilities of ALSA sequencer to produce MIDI accompaniment.