if signal is greater then threshold close gate~ for period of time -> ?


    Aug 11 2013 | 7:03 pm
    Hey!
    I've got simple problem but I can not find a simple answer. I would like to make a patch which do this simple operation
    each time an audio singal is greater then threshold close gate for 100 ms
    It's not a big deal to make it like this
    [>= threshold] - [gate~] - [edge~] - and bang from edge~ closes gate~ simple.
    but how to solve the problem and stay in signal domain? Thanks! wo

    • Aug 11 2013 | 7:49 pm
      Not exactly what you asked for, but here's a useful "ducker~" abstraction I keep on hand, for suppressing signals below a specified threshold. I think you could use
    • Aug 11 2013 | 9:44 pm
      This does what you want
    • Aug 13 2013 | 11:32 pm
      Thank you very much John!
    • Aug 15 2013 | 11:35 am
      Hey guys, I've got one more question cause I've got that feeling that I am missing something.
      sah~ is ok if you want to sync your signal to other one with freq of control signal but what if you wont to sync it to the event not to freq of control signal or even worse - you want to mix those to approaches
      for example you can send "clear" msg to dealy~ (John's example) but once again you are going out from dsp chain to shake hand with scheduler
      so how to managed complicated logical msp systems which do not produce sound at all - only transitions from 0 to 1 to 0 and so on
      have got any examples, tutorials, advices? or maybe it is time to dive in gen~?
      thanks once again!
    • Aug 15 2013 | 7:19 pm
      OK, I won't ask why you want "to manage complicated logical msp systems which do not produce sound at all." :)
      As you no doubt know, the logical operators such as >~, ==~, etc. generate 0 or 1 based on their input values. The delta~ and change~ objects are also good for observing what happens in a signal. And sah~ is good for sustaining an instantaneous sample value. phasor~ and count~ are good for cyclical/periodic recurrences at a specific interval of time, and delay~ allows you to offset a signal by a precise amount of time.
      So it's all just a matter of imaginatively combining those to do whatever task you're trying to do. Here's a patch that demonstrates a few tricks, and also shows a solution to your original question.
      (Oh, and yes, gen~ can be quite handy for this kind of stuff.)
    • Sep 11 2016 | 5:47 am
      Great examples Christopher! Cheers,
    • Sep 11 2016 | 6:19 pm
      you can control gate~ with line~ or index~ /~