how to track different frequencies?


    Sep 01 2008 | 2:09 pm
    hi there,
    i know something about the envelop follower and on how to create a threshold system that gives a bang when the sound reaches a certain amplitude, but!
    i don't know how to extrapolate from an audio input and map ranges of frequencies such as hi, low , mid-hi and so on...
    is anybody here that can help me with some tips?
    thanx
    fede

    • Sep 01 2008 | 2:26 pm
      The really great thing about Max 5 is that
      you can search for information from within
      the application. So, why not try it out? See
      what you can find out about the cross~ or the
      fffb~ objects.
      You can do this searching *before* you post
      questions, too. :-)
      The procedure will be a bit different for
      Max 4, but the object names remain.
    • Sep 17 2008 | 10:22 am
      fuzzz schrieb:
      > i know something about the envelop follower and on how to create a
      > threshold system that gives a bang when the sound reaches a certain
      > amplitude, but! i don't know how to extrapolate from an audio input
      > and map ranges of frequencies such as hi, low , mid-hi and so on...
      > is anybody here that can help me with some tips?
      If its about frequency bands, just split your signal with filters and
      then apply your envelope followers afterwards...
      Stefan
      --
      Stefan Tiedje------------x-------
      --_____-----------|--------------
      --(_|_ ----|-----|-----()-------
      -- _|_)----|-----()--------------
      ----------()--------www.ccmix.com
    • Sep 17 2008 | 12:59 pm
      I'm not sure what you're asking. Do you want to detect the amplitude in
      different frequency ranges? (in which case as Stefan mentioned use filters).
      Or are you after fundamental frequency (pitch) or partial detection? I use
      fiddle~ for that.
      Worth remembering that perceived loudness is not necessarily directly
      related to the overall amplitude of a signal but is frequency dependant. The
      higher frequencies increase in amplitude as natural loudness of an
      instrument increases. The range 1000-4000 Hertz is of crucial importance.
      Best
      Peiman
      2008/9/17 Stefan Tiedje
      > fuzzz schrieb:
      >
      >> i know something about the envelop follower and on how to create a
      >> threshold system that gives a bang when the sound reaches a certain
      >> amplitude, but! i don't know how to extrapolate from an audio input
      >> and map ranges of frequencies such as hi, low , mid-hi and so on... is
      >> anybody here that can help me with some tips?
      >>
      >
      > If its about frequency bands, just split your signal with filters and then
      > apply your envelope followers afterwards...
      >
      > Stefan
      >
      > --
      > Stefan Tiedje------------x-------
      > --_____-----------|--------------
      > --(_|_ ----|-----|-----()-------
      > -- _|_)----|-----()--------------
      > ----------()--------www.ccmix.com
      >
      >
      >
    • Sep 20 2008 | 5:49 pm
      thanx to all!
      now i got all the tips i needed