<- C I ->

rand, randh, randi

     kr   rand      xamp[, iseed]
     kr   randh     kamp, kcps[, iseed]
     kr   randi     kamp, kcps[, iseed]
     ar   rand      xamp[, iseed]
     ar   randh     xamp, xcps[, iseed]
     ar   randi     xamp, xcps[, iseed]
Output is a controlled random number series between +amp and -amp INITIALIZATION iseed (optional) - seed value for the recursive psuedo-random formula. A value between 0 and +1 will produce an initial output of kamp * iseed A negative value will cause seed re-initialization to be skipped. The default seed value is .5.PERFORMANCE The internal psuedo-random formula produces values which are uniformly distributed over the range kamp to -kamp. rand will thus generate uniform white noise with an R.M.S value of kamp / root 2.

The remaining units produce band-limited noise: the cps parameters permit the user to specify that new random numbers are to be generated at a rate less than the sampling or control frequencies. randh will hold each new number for the period of the specified cycle; randi will produce straightline interpolation between each new number and the next.

Example: 

     i1   =       octpch(p5)     ; center pitch, to be modified
     k1   randh   1,10      ;10 time/sec by random displacements up to 1 octave
     a1   oscil   5000, cpsoct(i1+k1), 1
<- C I ->
Prepared from the MIT Media Lab Csound Manual, PJN, Nov 1994.