[sdiy] Filter cut off DAC

[Scott Gravenhorst]

Going from my FPGA experiences, I'd say 10 or 12 is a good starting point if not a
good end point.  I used a 12 bit DAC and it made good quality audio (when the level
used all 12 bits of resolution).  A VCF would probably not even need 12 bits of
cutoff resolution IMO.  MIDI uses 7 bits of resolution for most things, which can
be a tad low for some things, but for filter cutoff it's probably OK as long as you
don't need to change it during a performance (then you *might* get a zipper effect
and that can be digitally removed).

YMMV

paula at synth.net wrote:
>Random question,
>
>How many bits is "enough" for controlling the filter cut off on a VCF?
>I would start with say 12, but would 16 be better? or 24?
>At some point there's a cost trade off.
>
>Thoughts?
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-- ScottG
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-- Scott Gravenhorst
-- http://scott.joviansynth.com/
-- When the going gets tough, the tough use the command line.
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