Signal Analysis/Processing Software

• General Analysis/Processing
  • Aglaophone "...a system of interconnectable modules for the recording, processing, and playback of real-time audio"
  • ATSH very cool analysis/resynthesis program from Prof. Oscar Pablo Di Liscia
  • CLAM the outstanding "C++ Library for Audio and Music " from the crew at UPF
  • ComParser computer software that recognizes and identifies realtime audio
  • Dataplore "a software tool designed for the analysis of signals and time series data of any kind"
  • FlowDesigner interesting visual environment for building audio and signal processing applications
  • FScape "audio rendering software for time domain and spectral signal processing...similar to SoundHack", requires Java
  • FreeADSP "free, audio-oriented, real-time, cross-platform DSP software" from Stefano D'Angelo
  • Guimauve "...is a graphical user interface to compute matching pursuit decomposition on a signal", from Fabien Brachere
  • HASAS is the HydroAcoustic Signal Analysis System from Jussi Laako
  • InSpect sound analysis/resynthesis/transformation from Sylvain Marchand
  • JAAA the JACK & ALSA Audio Analyser, an audio signal generator and spectrum analyser from Fons Adriaensen
  • KSFX is "... a kernel module that filters the outgoing audio stream and adds sound effects like low-pass, high-pass, echos...", from Anthony Lenton
  • LastWave wavelet DSP software from Emmanuel Bacry
  • Maaate an analysis toolkit for MPEG audio files; Bewdy is a visualization GUI for Maaate
  • Mustajuuri audio signal processing software with GUI and support for plug-ins
  • ObjectProDSP an X11 GUI for DSP design and implementation
  • PipeWave DSP and "auditory modelling" programs using UNIX pipes
  • Ptolemy homepage for the Ptolemy Project of the DSP Design Group at UCB
  • Scilab a large package of mathematics & signal processing functions with excellent graphic displays
  • Signal Applications To Audio Networks (SATAN) "a program that is used for various audio related signal processing tasks"
  • SNDAN signal analysis, graphics, modification, and synthesis
  • Sonic Flow designs/simulates audio signal processing networks
  • Sonic Visualiser advanced waveform/spectrogram viewer and audio annotation editor, from Chris Cannam
  • Sound Ruler acoustic analysis software from Marcos Gridi Papp
  • SSPLab AudioAnalyser (SAA) is "... a tool for analyzing audio signals in terms of its content"
  • Yorick another mathematics package with signal processing and data visualization tools
  • dsplab XForms-based DSP visualization and manipulation software
  • jein a Java version of Ein, DSP learning software from Paul Lansky and Ken Steiglitz

• Beat-tracking
  • BeatRoot "an interactive beat tracking and visualisation system", from Simon Dixon

• Binaural/Brainwave
  • AutoZen brainwave modification software
  • Gnaural binaural-beat generator, from gnaural (who else?)
  • SBaGen a "BinAural Brain Wave Experimenter's Lab" from Jim Peters

• Channel Vocoder
  • Vocoder a channel vocoder from Achim Settelmeier
  • XVOX realtime vocoder using LPC synthesis
  • Zerius Vocoder C and Java source code for software channel vocoder

• Convolution
  • Almus VCU "... makes a computer equipped with a multi-channel sound card into a real-time versatile convolver unit"
  • JACE JACK-based convolution engine from Fons Adriaensen

• FFT/Phase Vocoder
  • Enveloper draw FFT components and amplitude waveforms with this Java-based software from Abram Hindle
  • FreqTweak Jesse Chappell's very neat "tool for FFT-based realtime audio spectral manipulation and display"
  • GWave Analyzer visualizes/analyzes WAV files via FFT, also extracts melody to MIDI file
  • Kiss FFT very small FFT library, can use either fixed or floating point data types
  • NoTAM FFT/phase vocoder packages with X11 GUI now available for Linux:
    • Ceres
      • Ceres a greatly updated version from Kjetil S. Matheussen
      • Ceres3 a superb version from Stanko Juzbasic
    • NoTAMProgs the famous Institute has prepared its own sources for Linux
  • POWERpv spectral manipulation package from Eric Lyon
  • PVC an extensive set of phase vocoder tools and utilities from Paul Koonce, with a Linux version from John Gibson
  • PVNation Christopher Penrose's phase vocoder apotheosis
  • Sculptor a very nice suite of realtime FFT tools
  • SculptTool is a "utility which can import, modify, convert, export and synthesize audio analysis files saved in text format", from Stanko Juzbasic; available for Linux and LinuxPPC
  • XMANA a data display program with FFT and other transforms, uses XMAD data acquisition files
  • pvoc "... a collection of LADSPA units and a command line tool for time compression/expansion of sound data making use of the phase-vocoding technique", from Tim Goetze

• Filters
  • BruteFIR "...software for applying long FIR filters to multi-channel digital audio...offline or in realtime"
  • DRC "generates digital room correction FIR filers to be used within HiFi systems in conjunction with real-time convolution engines like BruteFIR"
  • Fiview Jim Peters' software for filter design and viewing
  • Poles and Zeros a demonstration applet, requires a Java-enabled browser
  • libfilth digital/analog filter design library from Anders Johansson
  • nwfiir audio tools software equalizer and other tools for high resolution digital audio

• Graphic I/O
  • Quickplot is an interactive 2D plotter with support for libsndfile
  • Spectromatic generates PNG spectrograms from audio files
  • Waveform draws and exports function graphs for use with audio programs and exports WAV files
  • rmsps analyzes sound files and creates Encapsulated Postscript graphics of the rms (loudness) curve

• Image To Sound
  • HyperMammut software for processing sounds and images, something new from Paul Nasca

• Libraries And Other Sources
  • AFsp/TSP audio signal processing suite, includes LPC analysis/synthesis package
  • AIFF_DSP a framework for user-defined DSP plugins to process AIFF soundfiles
  • FFTW C subroutine library for the "Fastest Fourier Transform in the West"
  • LibDSP Jussi Laako's library of common DSP functions
  • Music-DSP Source Code Archive code for synthesis, filters, analysis, effects, and other DSP functions
  • Sig++ "music signal processing in C++", from Craig Stuart Sapp
  • Signalgo Vadim Schetinkin's DSP library for Java
  • Sound Processing Kit C++ class library for audio signal processing
  • Utility Functions For DSP a collection at GA Tech

• Psychoacoustics
  • GuineaPig2 psychoacoustics research software from the TKK Acoustics Lab

• Reverb Code
  • lprev low-pass reverberator from the cmusic package
  • sverb Cedric Roux's "simple order-15 CFDN reverb"

• Room Impulse Measurement
  • Aliki alpha software for room impulse response measurement, more goodness from Fons Adriaensen

• Sample-rate Conversion
  • libsamplerate more excellence from codemeister Erik de Castro Lopo
  • rateconv high-quality sample rate converter
  • An Analysis of Sample Rate Conversion in SoX a report from Andreas Wilde

• Signal Generators
  • GtkSigGen signal generator with Gtk interface
  • Tempest for Eliza "...uses your computer monitor to send out AM radio signals...[to] hear computer generated music in your radio"
  • tonegen produces tones on /dev/dsp or stdout

• Spatialization
  • Ambidec an Ambisonic decoder from Richard W. E. Furse
  • Space spatializes soundfiles
  • Surround Utilities tools from Greg Lee for working with 6-channel soundfiles, requires libsndfile
  • VSpace spatial sound processing tools from Richard Furse

• Speaker Design
  • GSpeakers "... a Gnome-based loudspeaker design program", from Daniel Sundberg
  • KFilter neat GUI for designing speakers
  • QLoud Andrew Gaydenko's "tool to measure loudspeaker frequency and step responses and distortions"