ioffset -- the delay before the first impulse. If it is negative, the value is taken as the number of samples, otherwise it is in seconds. Default is zero.
xamp -- amplitude of final output
kbeta -- beta of the lowpass filter. Should be in the range of 0 to 1.
The filter equation is:
y_n = sqrt(1-beta^2) * x_n + beta Y_(n-1)
Here is an example of the noise opcode. It uses the files noise.orc and noise.sco.
Example 1. Example of the noise opcode.
/* noise.orc */
/* Written by Kevin Conder */
; Initialize the global variables.
sr = 44100
kr = 4410
ksmps = 10
nchnls = 1
; Instrument #1.
instr 1
kamp = 30000
; Change the beta value linearly from 0 to 1.
kbeta line 0, p3, 1
a1 noise kamp, kbeta
out a1
endin
/* noise.orc */
/* noise.sco */
/* Written by Kevin Conder */
; Play Instrument #1 for one second.
i 1 0 1
e
/* noise.sco */