[sdiy] Best ideas for (2) MN3004 BBDs?

[Amos]

Thanks for the info (and commentary) Harry!
Yes, BBDs may suck from an audiophile perspective (and perhaps other points
of view) --
But have you ever noticed how many tonal innovations have come from creative
misuse of "suck-ful" audio? From the first (intentional) distortion circuit,
to reel-to-reel tape flanging, and onwards...

I'll start digging thru those links tonight.

-Amos ...moss...osss..hxxssskznnnn... (BBD saturation simulation)

On 11/7/05, Harry Bissell Jr <harrybissell at prodigy.net> wrote:
>
> Hi Amos...
>
> I'd suggest building a FIRE with them :^P (inline)
>
> --- Amos <controlvoltage at gmail.com> wrote:
>
> > Hey all...
> >
> > I just scored a pair of MN3004 BBD chips and would
> > like to build something
> > cool with them.
> > Do I need the associated clock chips, or can I clock
> > them from a homebrew
> > VCO/LFO of some sort?
>
> You could clock them from a biphase clock, usually
> generated with a CD4013 D-FF etc. There are a million
> ways to do this. Having a good non-overlapping clock
> is important.
>
> Does anyone have a link to
> > some good projects for this
> > one? According to the datasheet I can get 25.6ms max
> > delay from each chip, I
> > am assuming this could be underclocked for longer
> > lo-fi delay though.
>
> You must have filtering on the input and output to
> remove any harmonics that would be outside of the
> 'Nyquist" sampling limit. The clock must be 2X the
> highest harmonic present in the input signal.
>
> If you bring the clock down into the human hearing
> range, the output filter MUST be able to remove it
> or you will hear a horrible whine.
>
> I'd study all the delay drojects at geofex.com <http://geofex.com>
> diystomboxforum, etc...
>
> H^) harry (did I say BBDs suck ??? :^)
> >
> > All ideas/opinions welcome... thanks!
> >
> > -Amos
> >
>
>
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