Hallo!

basically, i want to make an abstraction which has a signal input, and a signal output (which is initially silence regardless of input signal). when it recieves a bang (in a different inlet maybe) it should wait for the next zero-crossing in the input signal, then let the signal through for a specified number of zero-crossings (lets say 20) then it turns off again on the 20th zero-crossing.

okay I understand ...

so far i've got a signal which is 1 when there is a zero crossing and 0 otherwise (attached), i just need to use this to switch on the output when the first 1 arrives at a point after there is a bang or a 1 to signal that we want output to turn on.

okay I see ... so the problem ATM is how to count the zero crossings ...

i see.. so to do things sample by sample, everything has to be signals? no control values. thats what makes this tricky i guess.

you can also have a look at the iem_t3_lib external which allows you sample accurate processing ...

On the other hand: do you really need to be sample accurate ? I mean do you use it for measurements or for sth./what else ?

LG Georg