One of my students was asking if there is a version of the the buzz
opcode that has a fade-in for each harmonic so that pops do not occur
in the output. I didn't know if there was and couldn't find on in the
manual so I set about doing a simple UDO for him. Here's what I have,
the problem is explained below:

        opcode testBuzz, a, kikip
kamp, ifreq, khrm, ifn, icnt   xin     ; read input parameters
if (icnt >= 10) goto skip
   kenv linseg 0, 0.1, 1, 1, 1
   a1   testBuzz kamp*kenv, ifreq, khrm, ifn, icnt+1
skip:
   aout oscil kamp/khrm, ifreq*icnt, ifn
        xout (aout+a1)                 ; write output
        endop

The problem is that if I use khrm instead of 10 in my test against
icnt, csound will baulks out at init-time. Any suggestions as how can
I do this? I'm trying to use that hkrm value toset the number of
harmonics.

Rory.