[sdiy] Sound synthesis with microcontrollers

[Jaroslaw Ziembicki]

  ----- Original Message ----- 
  From: phillip m gallo 
  To: Jaroslaw Ziembicki 
  Sent: Friday, June 27, 2003 7:43 PM
  Subject: RE: [sdiy] Sound synthesis with microcontrollers


  Jarek,

  Yes i have done quite a bit of work with micro's.  I find it's very interesting stuff.  There are certain  issues that have to be resolved in how you implement the user interface, i prefer to "mimik" the analog approach as much as possible.

  regards,
  p


    I developped the AT90S8535 synth according to the simple rule: each function should have its own
    switch or potentiometer (this always lacked me in the synths I owned).
    A couple of details:
    Some pot values (0..255) are recalculated into 24 bit LFO/ADSR rates, I use here ROM "look-up
    tables" (I think they are called so). The DETUNE pot value is also converted to allow for very fine
    tuning in the middle range (so I can get a really close unisono).
    I do neither any filtering of the pot values nor any "debouncing" of the switches.

    Regards
    Jarek

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