CDP8/docs/r8groups.txt at main · visagemsc/CDP8 · GitHub

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CDP Release 8 programs - core groups

[any programs not listed here fall into a general group of "misc" processing tools, some as background utility programs for Soundloom]


1. Synthesis.

General note: CDP hitherto has essentially limited pure synthesis processes
to the generation of basic signals ("synth", "newsynth").

Release 8  introduces a number of new tools, all idiosyncratic one way and another,
extending to note and rudimentary score-based composition.
We suggest they should all be regarded as R&D tools, maybe production of raw
source material, rather than anything that would directly form or contribute to a
completed piece. However, for developers they may provide opportunities for
custom adaptations and extensions.


 * clicknew:    make clicktrack using times listed in textfile.

 * multiosc:    FM-style chain of sines, four "operators". Limited envelope control.

 * multisynth:  Synthesize several sound-streams from a score.
                Targetted at multichannel projects, but stereo also supported.

 * newscales:   Basic note generation using a fixed spectrum, no enveloping.
                The program name suggests it is used for simple "scale" generation,
                e.g. for experimental tunings.

 * newsynth:    Updated for R8, new mode "fractally arrayed spikes"

 * pulser, Mode 3 "synth": generate wave-packets with fixed or varying spectrum.

 * synspline:   Synthesis from waveforms made by smoothly joining
                randomly generated points.

 *  ts:         waveform generation/plot using time-series data,
                as in "drawing" a waveform. Should this be called "Fairlight"?


 2.  Waveset distortion processes.

 * distcut:    Cut sound into elements (multiple outfiles) with falling envelope.

 * distmark:   Interpolate between waveset groups.

 * distmore:   multiple new distortion processes. Mostly aimed at speech processing.

 * distrep:    waveset-based timestretching.

 * distshift:  literally, shift groups of half-wavecycles in time.

 ( * distwarp:  warp wavecycles. Not in Soundloom)

 * partition:   partition infile into multiple files by waveset blocks.

 * quirk:       raise samples to a power (<>1), based on wavecycles.

 * scramble:    scramble order of wavesets in infile. 14 processes.


 * splinter:	Creates splinters by repeating & shrinking selected waveset-group in sound.
		Either splinters repeat before merging with orig snd at time-in-src specified.
		OR original sound plays up to selected time, then splinters.

 See also clip mode 2 (half-waveforms)

 3. Pvoc/amp/freq analysis/transformation tools. Several of these appear to be
    primarily tools for Soundloom data display.

 * caltrain:    time-blur upper partials.

 * cubicspline: (datafile only): smooth amp/freq data points to make spectrum.


* specanal:     custom (complex) version of pvoc, generate data files, e.g.
                    to visualise spectrum.

* specav:       average spectrum, output multiple spectrum datafiles.

* specenv:      spectral envelop transfer, probably like classic "pvcross".

* specfnu:      large complex progtam to process formants, spectral shape.

*specfold:      fold/invert/randomize part of the spectrum.

*spectstr:      time-stretching.

*spectune:      find and manipulate pitches in input file.
                Options to map to pitch data in "tuning file".

*speculate:     permutations of channel data, creates large number of outfiles.

*suppress:      suppress most prominent partials in chosen freq band.


4. Multichannel tools. Primarily for discrete surround, e.g. 8 or even 16 chans.
                        Many support simple stereo too.

* brownian:     generate texture of [short} sampled elements, based on brownian motion.

* cascade:      segments of source repeat-echoed,a ccumulated. many options.

* crumble:      project mono source to all chans, plus segmentation etc.
                Complex, output either 8 chans or 16 chans(!).

* crystal:      based on model of crystal ( regular polyhedron?), with 3d rotations.

* multisynth:   (see above), includes multichan options.

* onset:        find successive onsets in m/c file. May be utility for Soundloom.

* pairex:       extract arbitrary pair of chans from m/c file.

* pulser:       (see above) streams of pulses, some m/c options.

* repair:       join mono sounds into stereo/multichan outputs. so name = 're-pair".

* rotate:       generate list of x/y coordinates - for Soundloom?

* spin:         spin stereo image across m/c stage, usage msg a bit ambiguous,
                seems to offer general n-chan options,
                while also specifying stereo, quad, 5-chan.

*tesselate:     repeating and shifting patterns (in space, time). outchans >= 2.

*tremenv :      tremolo a sound, width narrowed, after peak.


5. Speech processing.

These explicitly reference syllables, etc, in their usage messages.

*distmore:      (see above) Mode USAGE msgs cite application to vowels/consonants.

*envspeak:      Process speech "syllables".
                [NOT IN SOUNDLOOM]

*flatten:       equalise sound elements. Usage implies application to syllables etc.

* stutter:      slice source into elements (e.g. words or syllables).