39 lines
974 B
Racket
39 lines
974 B
Racket
#lang scribble/manual
|
|
@(require (for-label racket))
|
|
|
|
@title{(buf-comb-c buf in delaytime decaytime)}
|
|
|
|
|
|
Buffer based comb delay line with cubic interpolation
|
|
|
|
All pass delay line with cubic interpolation which uses a buffer
|
|
for its internal memory. See also buf-comb-n which uses no
|
|
interpolation, and buf-comb-l which uses linear interpolation. Cubic
|
|
interpolation is more computationally expensive than linear, but
|
|
more accurate. See also comb-c.
|
|
|
|
buf - buffer number.
|
|
|
|
in - the input signal.
|
|
|
|
delaytime - delay time in seconds.
|
|
|
|
decaytime - time for the echoes to decay by 60 decibels. If this
|
|
time is negative then the feedback coefficient will be
|
|
negative, thus emphasizing only odd harmonics at an
|
|
octave lower.
|
|
|
|
|
|
@racketblock[
|
|
(with-sc3
|
|
(lambda (fd)
|
|
(async fd (b-alloc 0 44100 1))))
|
|
]
|
|
|
|
|
|
@racketblock[
|
|
(let ((x (mul3 (decay (dust ar 1) 0.2) (white-noise ar) 0.5)))
|
|
(audition (out 0 (buf-comb-n 0 x 0.25 6))))
|
|
]
|
|
|
|
|