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The main operational difference is that for v4 effect onward, the sound name will now be *TRACK*. This will not affect existing effects since they use version number 3 or less. This also provides the Nyquist effect with much more information about the current processing: Variable Property What *AUDACITY* VERSION current Audacity version number *SYSTEM-DIR* BASE Audacity install path *SYSTEM-DIR* DATA Audacity data path *SYSTEM-DIR* HELP Audacity help path *SYSTEM-DIR* TEMP Audacity temp file path *SYSTEM-DIR* PLUGIN Audacity search path for Nyquist plugins *PROJECT* RATE current project sample rate *PROJECT* TRACKS total number of tracks in the project *PROJECT* WAVETRACKS number of wave tracks in the project *PROJECT* LABELTRACKS number of label tracks in the project *PROJECT* MIDITRACKS number of midi tracks in the project *PROJECT* TIMETRACKS number of time tracks in the project *SELECTION* START start time of current selection *SELECTION* END end time of current selection *SELECTION* TRACKS number of tracks in the current selection *SELECTION* CHANNELS number of channels in the current selection *SELECTION* LOW-HZ low frequency from spectrogram (if available, else nil) *SELECTION* CENTER-HZ center frequence (calculated) (if available, else nil) *SELECTION* HIGH-HZ high frequence from spectrogram (if available, else nil) *SELECTION* BANDWIDTH bandwidth in octaves (calculated) (if available, else nil) *SELECTION* PEAK-LEVEL peak amplitude for the current selection *TRACK* INDEX 1-based index of track being processed *TRACK* NAME name of track *TRACK* TYPE type of track: wave, midi, label, time *TRACK* VIEW track view: Waveform, Waveform (dB), etc. *TRACK* CHANNELS number of channels in the track *TRACK* START-TIME start time of track *TRACK* END-TIME end time of track *TRACK* GAIN track gain *TRACK* PAN track pan *TRACK* RATE sample rate of track *TRACK* FORMAT sample format: 16 (int), 24 (int), 32.0 (float) *TRACK* CLIPS list of start/end times for clips for each channel
libnyquist Library code and the "nyx" interface by Dominic Mazzoni. Updated to Nyquist version 3.03 by Leland Lucius. Originally based on Nyquist version 2.29 by Roger B. Dannenberg, which was based on xlisp 2 by David Michael Betz. For license information, please see the file LICENSE.txt libnyquist currently only exists as part of Audacity. For information on using libnyquist as an embedded audio processor within another application, contact the Audacity developers: http://audacity.sourceforge.net For information about Nyquist as a standalone, interactive audio programming language, see the Nyquist website: http://www.cs.cmu.edu/~music/nyquist/ See nyquist/Readme.txt for latest changes to Nyquist.