not possible to skip audio output in UDO?

[joachimheintz]

when i have a csound instrument, i can skip a certain number of k-cycles by a loop like this:

  kCount init 0
  skip:
  (do something)
  kCount += 1
  if (kCount < iTimeToSkip*kr) kgoto skip

this works inside an instrument, but not inside a UDO:

opcode Play,a,Si
  Sfile,iTimeToSkip xin
  kCount init 0
  skip:
  aOut = poscil:a(0.2,expon:k(400,2,1600))
  kCount += 1
  if (kCount < iTimeToSkip*kr) kgoto skip
  xout(aOut)  
endop

instr 1 // works
  iTimeToSkip = p4
  kCount init 0
  skip:
  aOut = poscil:a(0.2,expon:k(400,2,1600))
  kCount += 1
  if (kCount < iTimeToSkip*kr) kgoto skip
  outall(aOut)
endin
schedule(1,0,1,0)
schedule(1,2,1,1) ;skips the first second 

instr 2 // does not work
  iTimeToSkip = p4
  aOut = poscil:a(0.2,expon:k(400,2,1600))
  outall(aOut)
endin
schedule(2,4,1,0)
schedule(2,6,1,1) ;does NOT skip the first second

is this expected behaviour? or is it a bug?

[vlazzarini]

maybe I am getting some wires crossed but I can't seen in instr 2 any code to skip anything (ie. the UDO is not called?)

[joachimheintz]

of course your wires are straight and mine were very crossed this morning ... (i was at first using diskin and then saw that it is not related to it but can also demonstrated on a simple oscillator.) thanks for looking into it; here is the correct code: opcode Play,a,i iTimeToSkip xin kCount init 0 skip: aOut = poscil:a(0.2,expon:k(400,2,1600)) kCount += 1 if (kCount < iTimeToSkip*kr) kgoto skip xout(aOut) endop instr 1 // works iTimeToSkip = p4 kCount init 0 skip: aOut = poscil:a(0.2,expon:k(400,2,1600)) kCount += 1 if (kCount < iTimeToSkip*kr) kgoto skip outall(aOut) endin schedule(1,0,1,0) schedule(1,2,1,1) ;skips the first second instr 2 // does not work iTimeToSkip = p4 aOut = Play(iTimeToSkip) outall(aOut) endin schedule(2,4,1,0) schedule(2,6,1,1) ;does NOT skip the first second

…

On 15/01/2024 16:16, vlazzarini wrote: maybe I am getting some wires crossed but I can't seen in instr 2 any code to skip anything (ie. the UDO is not called?) — Reply to this email directly, view it on GitHub <#1808 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAQYHKS4HMFPUL4RAJKTD2TYOVB6PAVCNFSM6AAAAABB273NLSVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMYTQOJSGM3DEMJWGU>. You are receiving this because you authored the thread.Message ID: ***@***.***>

[vlazzarini]

There s a problem somewhere and I think I have seen it before. If you make the small change

opcode Play,a,Si
  Sfile,iTimeToSkip xin
  kCount init 0
  kgoto nxt
  skip:
  nxt:
  aOut = poscil:a(0.2,expon:k(400,2,1600))
  kCount += 1
  if (kCount < iTimeToSkip*kr) kgoto skip
  xout(aOut)  
endop

you get the expected result. If I remember it properly, the problem was that the label was not found inside the UDO and the code jump did not work. Adding another label seems to force it to be found. I thought we had fixed this. @jpffitch do you remember this issue from another time? I can't recall what we did with it,