ASM-1 Filter Tuning...

[gstopp at fibermux.com]

     Yah it's true, you can leave off just about all of 'em if you can find 
     resistor values that make you happy.... the only ones that are best 
     left as trimmers are the Volts/Octave trimmers in the VCOs and the 
     VCF. Most of them are "set and forget" anyway.
     
     Trimmers you can just leave off are:
     
     VCF "OFFSET"
     VCA "OFFSET"
     VCO "INIT FREQ"
     
     Trimmers that you must replace with resistors if you remove them are:
     
     EG "GATE THRESH."
     EG "ATK PEAK"
     EG "SUS TRIM"
     NOISE "NOISE LEVEL"
     
     You can make the "NOISE LEVEL" trimmer a panel control if you want, so 
     you can adjust the noise volume at all three outputs (white, pink, 
     random) from zero to max.
     
     - Gene


______________________________ Reply Separator _________________________________
Subject: Re: ASM-1 Filter Tuning...
Author:  Christopher_List at sonymusic.com at ccrelayout
Date:    12/17/96 6:18 PM
     
       > On the next ASM that I build, I think I'll just leave off 
       > these parts entirely and put a jumper in the 220 ohm
       > resistor spots, and see if the filter is offset-free.
     
  These are certainly not the only trimmer that can be left off by the 
  expense-concious builder.
     
  Gene did us a great service by putting in all possible triimming options 
  - but you need not use them all.
     
  The Gate Level - for instance. I have all my gates hard set to 3.15v by 
  always using a 20K/75K divider on the gate inputs. Imperfect resistors 
  may make one gate trigger level slightly different from another - but 
  with 1% resistors (that are A LOT cheaper than trimmers!) this is not 
  much of a problem. It's easy to solder in two resistors into thge spot 
  where the trimmer goes - so y'all might wanna give it a try....
     
  - CList