Frinika is a free, complete music workstation software for Linux, Windows, Mac OSX and other operating systems running Java. It features a sequencer, soft-synths, real-time effects and audio recording.

Frinika is a free, complete music workstation software for Linux, Windows, Mac OSX and other operating systems running Java. It features a sequencer, soft-synths, real-time effects and audio recording.

The freeDSP is an open-source digital signal processor family for the do-it-yourself community. The applications range from active loudspeaker concepts (digital crossovers, bass enhancement, …) and room equalization over advanced musical effect processors to car audio signal processing.

The LinuxSampler project was founded in 2002 with the goal to produce a free, (cross-platform), streaming capable, open source, pure software audio sampler with high stability, efficiency and very low latency, while providing professional grade features, comparable to both hardware and commercial Windows / Mac software samplers and to introduce new features not yet available by any other sampler in the world.

Visual Front Ends ~ GUI:

QSampler

JSampler
Impro-Visor (short for “Improvisation Advisor”) is a music notation program designed to help jazz musicians compose and hear solos similar to ones that might be improvised. The objective is to improve understanding of solo construction and tune chord changes. There are other, secondary, things it can do, such as improvise on its own. It has also been used for transcription. Because rhythm-section (e.g. piano, bass, drums) accompaniment is automatically generated from chords, Impro-Visor can be used as a play-along device. Now having a wider array of accompaniment styles, its use is not limited to jazz.

www.cs.hmc.edu
sourceforge.net/projects/impro-visor
en.wikipedia.org/wiki/Impro-Visor
OpenSebJ is a free real time audio sample mixer that runs on Microsoft Windows. The source code for OpenSebJ is released under the GNU General Public License.
- Supports loading of 255 audio samples, in wav format, which can be played in real time.
- Sample properties such as volume, pan and frequency can be adjusted individually for each sample. (even during mid-play)
- A composition tool is provided and presented in a familiar multi-track sequencer environment. Looping compositions are also supported.
- Samples can be linked to keys on a keyboard and triggered in real time when a key press occurs.
- Each sample can also have the play cursor position adjusted while the sample is playing, to provide a virtual needle to be moved.
- Stream to disk recording, allows all audio played from OpenSebJ to be saved.
- Pitch shifter roll, allows an order to be set up, so that each time a sample is played, the next pitch shift in the sequence is undertaken before the sample is played. i.e. set up a sample to key ‘1’, then set up a pitch shift sequence, high, mid, low, higher, etc. (using frequency values which are transposed onto screen ‘ranges’ to allow easier utilization).

This is a program for stretching audio. It is suitable only for extreme sound stretching of the audio (like 50x) and for applying special effects by “spectral smoothing” the sounds. It can transform any sound / music to a texture. The program is Open-Source and it’s released under the version 2 of the General Public License. You can download the source code for Linux or the Windows binaries.
The Robust Audio Tool (RAT) is an open-source audio conferencing and streaming application that allows users to participate in audio conferences over the internet. These can be between two participants directly, or between a group of participants on a common multicast group.

mediatools.cs.ucl.ac.uk
freshmeat.sourceforge.net/projects/rat
NINJAM is open source (GPL) software to allow people to make real music together via the Internet. Every participant can hear every other participant. Each user can also tweak their personal mix to their liking. NINJAM is cross-platform, with clients available for Mac OS X, Linux and Windows. REAPER (our digital audio workstation software for Windows and OS X) also includes NINJAM support (ReaNINJAM plug-in).

Elpetozede is a multi-platform, open source tool to split a wave file (.wav), which contains the complete audio recording of one side of a vinyl record or a cassette tape into single wav files, one for each track. It searches an Internet database (musicbrainz.org) for the album data, so, with a little luck, you won’t need to type all the track information by hand.

MilkyTracker is an open source, multi-platform music application for creating .MOD and .XM module files. It attempts to recreate the module replay and user experience of the popular DOS program Fasttracker II, with special playback modes available for improved Amiga ProTracker 2/3 compatibility.
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milkytracker.titandemo.orgsite
github.com/milkytracker/MilkyTracker
en.wikipedia.org/wiki/MilkyTracker
xwax is an open-source Digital Vinyl System (DVS) for Linux. It allows DJs and turntablists to playback digital audio files (MP3, Ogg Vorbis, FLAC, AAC and more), controlled using a normal pair of turntables via time coded vinyls.
It’s designed for both beat mixing and scratch mixing. Needle drops, pitch changes, scratching, spinbacks and rewinds are all supported, and feel just like the audio is pressed onto the vinyl itself.
The focus is on an accurate vinyl feel which is efficient, stable and fast.

MusE is a MIDI/Audio sequencer with recording and editing capabilities written originally by Werner Schweer, and now developed and maintained by the MusE development team. MusE aims to be a complete multi-track virtual studio for Linux. It is published under the GNU General Public License.
