tuning/pitching resonant filters, need help with [expr]


    Jul 08 2011 | 4:30 pm
    Hi I am separately tuning a resonant filter and an IIR delay line, to give a 2 octave scale. Using my ears I've got 520Hz for middle C, 1040Hz for the octave above and 2080Hz for the next C above that. For the delay line I've got 132, 264 and 530 for the same pitches.
    Can anyone work out the expression I need to use on a single integer/float input to give me those values; ie 520=132, 1040=264, etc. It is almost doubling every octave, but I'm aware that we hear pitch frequencies on a logarithmic scale. I'm not too concerned with precision, just an approximation.
    Thanks Brendan

    • Jul 08 2011 | 4:40 pm
      It seems to be just a division of approx 3.94?
    • Jul 08 2011 | 5:44 pm
      Hey Tim
      works perfectly; [reson~] and [tapout~] now permanently consonant, thanks
      Brendan