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color organ

ryester1120ryester1120 Posts: 21
edited 2008-03-20 11:51 in General Discussion
···· I am trying to make a color organ powerd by my sx chip or run through my chip.· Is there anyway that I can do this?· Is there anwway for me to do this?confused.gifconfused.gifconfused.gifconfused.gif

Comments

  • PJAllenPJAllen Banned Posts: 5,065
    edited 2008-03-20 00:39
    I say, Yes.

    SX/B 1.51 has a new command called ANALOGIN, so, in a nut-shell,·with that much and some band-pass filters, it could be done.

    [noparse][[/noparse]A color organ just turns a light on when a sound of sufficient amplitude·within an established·bandwidth excedes a given threshold.· It's not a VU-meter.]

    Post Edit -- I would use op-amps instead of an SX-28, but you could do it with an SX as described.


    Post Edited (PJ Allen) : 3/20/2008 2:45:42 AM GMT
  • djmullendjmullen Posts: 10
    edited 2008-03-20 11:51
    It's possible to do it with just a microprocessor chip too.· I remember the old Tandy color computer had a program that would do spectrum analysis on the screen and they had no tuned circuit or a to d converter.· Unfortunately, I don't know how they did it.· I think it had something to do with watching a port that had the audio applied to it and counting zero crossings or some such.· Wish I could tell you more, but it IS possible.
    ·
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