Greyhole | SuperCollider 3.12.2 Help

Description

A complex echo-like effect, inspired by the classic Eventide effect of a similar name. The effect consists of a diffuser (like a mini-reverb, structurally similar to the one used in JPverb) connected in a feedback system with a long, modulated delay-line. Excels at producing spacey washes of sound.

Developed as part of the DEIND project.

NOTE: Please increase server realtime memory for this to work properly

s.options.memSize_(65536 * 4); s.reboot;

Class Methods

Greyhole.ar(in, delayTime: 2.0, damp: 0.0, size: 1.0, diff: 0.707, feedback: 0.9, modDepth: 0.1, modFreq: 2.0)

NOTE: This UGen always generates a stereo signal.

Arguments:

in	either an array of two audio signals (stereo), or a mono audiosignal.
delayTime	approximate reverberation time in seconds `(0.1..60 sec)`.
damp	controls damping of high-frequencies as the reverb decays. 0 is no damping, 1 is very strong damping. Values should be between `(0..1). argument`size scales size of delay-lines within the diffusion unit, producing the impression of a larger or smaller space. Values below 1 can sound metallic. Values should be between `(0.5..5)`.
diff	controls pattern of echoes produced by the diffuser. At very low values, the diffuser acts like a delay-line whose length is controlled by the 'size' parameter. Medium values produce a slow build-up of echoes, giving the sound a reversed-like quality. Values of 0.707 or greater than produce smooth exponentially decaying echoes. Values should be in the range `(0..1)`.
feedback	amount of feedback through the system. Sets the number of repeating echoes. A setting of 1.0 produces infinite sustain. Values should be in the range `(0..1)`.
modDepth	depth `(0..1)` of delay-line modulation. Use in combination with modFreq to produce chorus and pitch-variations in the echoes.
modFreq	frequency `(0..10 Hz)` of delay-line modulation. Use in combination with modDepth to produce chorus and pitch-variations in the echoes.

Returns:

a UGen

Inherited class methods

Instance Methods

Inherited instance methods

Examples

Minimal example (headphones recommended):s.options.memSize_(65536 * 4); s.reboot; { var src = SoundIn.ar(0)!2; // stereo input var rev = Greyhole.ar( src, \dtime.kr(0.1), \damp.kr(0.1), \size.kr(1), \diff.kr(0.707), \fb.kr(0.1), \modDepth.kr(0.01), \modFreq.kr(2) ); Mix([src, rev]) * 0.1; }.play

Ndef-based example:( s.options.memSize_(65536 * 4); s.reboot; Spec.add(\damp, [0, 1]); Spec.add(\diff, [0, 1]); Spec.add(\highband, [1000, 10000, \exp]); Spec.add(\highx, [0, 1]); Spec.add(\lowband, [100, 6000, \exp]); Spec.add(\lowx, [0, 1]); Spec.add(\modDepth, [0, 50]); Spec.add(\modFreq, [0, 10]); Spec.add(\midx, [0, 1]); Spec.add(\size, [0.5, 3]); Spec.add(\t60, [0.1, 60, \exp]); Spec.add(\wet, [0, 1]); Spec.add(\shelfslope, [1, 10]); Spec.add(\shelfFreq, \freq); Spec.add(\fb, [0, 1]); Spec.add(\dtime, [0, 2]); ) ( Ndef(\src, { //SoundIn.ar([0, 1]) Splay.ar(Impulse.ar([1, 3, 5, 7, 9]).scramble); }); Ndef(\hole, { var src, delay, amp; src = LeakDC.ar(Ndef(\src).ar); src = src * \amp.kr(1); // var src = Impulse.ar(0.5); delay = Greyhole.ar( src, \dtime.kr(0.1), \damp.kr(0.1), \size.kr(1), \diff.kr(0.707), \fb.kr(0.1), \modDepth.kr(0.01), \modFreq.kr(2) ); delay }); ) Ndef(\src).play; Ndef(\hole).play; Ndef(\hole).edit; Ndef(\src).edit;

For the Greyball piece ( see http://tai-studio.org/portfolio/greyball.html ), the following source was used, Ndef(\hole) remains unchanged.Ndef(\src).fadeTime = 4; Ndef(\src).quant = 2; Ndef(\src, { var src = 10.collect{ Pan2.ar([HPF, LPF, ComplexRes].choose.performKeyValuePairs(\ar,[ \in, [Impulse, LFPulse].choose.ar( [4, 2, 1, 1/2, 1/3, 1/4, 1/6].choose, iphase: [0, 1/4, 1/8, 1/2, 1/3].choose, phase: [0, 1/4, 1/8, 1/2, 1/3].choose, width: [0.001, 0.0001, 0.01, 0.1, 0.2].choose, mul: [1, 2, 3, 4].choose.reciprocal * [1, -1].choose ), \freq, [10000, 2000, 1000, 500, 250, 125, 125/2].choose, \decay, [0.1, 0.2, 0.4, 1].choose, ] ), Rand(-1, 1)); }.sum; HighShelf.ar(src, \shelfFreq.kr(1000), \shelfslope.kr(1)); })

NOTE: Since Impulse and LFPulse are chosen to be used at evaluation time, the given argument names might not match to the chosen UGen's interface. Since a superfluous argument does not affect a UGen's operation, the warnings can be ignored.

helpfile source: /usr/local/share/SuperCollider/Extensions/SC3plugins/DEINDUGens/HelpSource/Classes/Greyhole.schelp
link::Classes/Greyhole::

Greyhole : Object Extension