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Sidplay 2 is the second in the Sidplay series originally developed by Michael Schwendt. This version is written by Simon White and is cycle accurate for improved sound reproduction. Sidplay 2 is capable of playing all C64 mono and stereo file formats.

SLV2 is a library to make the use of LV2 plugins as simple as possible for applications.

Cross-platform audio loop slicer designed to create sliced loops from WAV, MP3, FLAC or AIFF files in seconds without a sequencer. Effects include filter sweeps, phasing, flanging, delay, and distortion.

The Snack Sound Toolkit is designed to be used with a scripting language such as Tcl/Tk or Python. Using Snack you can create powerful multi-platform audio applications with just a few lines of code. Snack has commands for basic sound handling, e.g. sound card and disk I/O. Snack also has primitives for sound visualization, e.g. waveforms and spectrograms. It was developed mainly to handle digital recordings of speech, but is just as useful for general audio. Snack has also successfully been applied to other one- dimensional signals. The combination of Snack and a scripting language makes it possible to create sound tools and applications with a minimum of effort. This is due to the rapid development nature of scripting languages. As a bonus you get an application that is cross-platform from start. It is also easy to integrate Snack based applications with existing sound analysis software.

When you study music on high school, college or music conservatory, you usually have to do ear training. Some of the exercises, like sight singing is easy to do alone. But often you have to be at least two people, one making questions, the other answering. GNU Solfege tries to help out with this. Solfege is a computer program written to help you practise the more simple and mechanical exercises on your own. These are the exercises written so far: * Recognise melodic and harmonic intervals * Compare interval sizes * Sing the intervals the computer asks for * Identify chords * Sing chords * Scales * Dictation * Remembering rhythmic patterns

SooperLooper is a live looping sampler capable of immediate loop recording, overdubbing, multiplying, reversing and more. It allows for multiple simultaneous multi-channel loops limited only by your computer's available memory.

soundgrab is designed to help you slice up a big long raw audio file (by default 44.1 kHz 2 channel signed sixteen bit little endian) and save your favorite sections to other files. It does this by providing you with a cassette player like command line interface. Commands like ff <secs>, rw <secs>, jump <offset_from_start> can be used while the volume is being played or while it is stopped to move the player head around. The commands mark and name allow you to give names to sections between the mark and the current position of the player head (like emacs mark and point concept), and the export command exports the named sections to other files in wav, cdr (CD mastering), or raw format (or ogg or flac format if the appropriate encoder binaries are found on your system).

SoundTracker is a pattern-oriented music editor (similar to the classic DOS program FastTracker and the Amiga legend ProTracker). Samples can be lined up on tracks and patterns which are then arranged to a song. Supported module formats are XM and MOD; the player code is the one from OpenCP. A basic sample recorder and editor is also included.

Specimen is an open source, MIDI controllable audio sampler. Features include: - Up to 64 patches with 8 notes of polyphony each - Fast, high quality pitch scaling - Linear ADSR volume envelopes - MIDI/jack-transport syncable LFOs - Low pass filter with resonance - A variety of direction-independent playback modes - A zoomable sample editor for loop and play points - Portamento

Sphinx 2 is a large-vocabulary, speaker-independent, continuous speech recognition engine. This is an early release of a research system. The APIs and function names are likely to change, and several tools still need to be made available to make this all complete. Once the system is built, try running the Perl script sphinx2-demo. The sphinx2-test script should run sphinx2-batch over an example utterance of "go forward ten meters." Trevor Johnson