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)
where x_n is white noise.
Here is an example of the noise opcode. It uses the files noise.orc and noise.sco.
Example 237. Example of the noise opcode.
/* noise.orc */ ; 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 */ ; Play Instrument #1 for one second. i 1 0 1 e /* noise.sco */