MOTM

Exactly. These days, if you were designing and building a sequencer (I am),
the very lowest end digital circuits you would use would be a digital
counter, and a digital demultiplexer to convert the binary counter outputs
to individual control lines.

However, keep in mind that this is just the CONTROL circuitry. It may be
used to switch actual pots into the output, yielding 100% analog control of
your output voltages, OR you could go to an entirely digital design as we
discussed earlier, replacing the counter/demultiplexer with a cpu, encoding
the pot voltages with an ADC, and playing them back from a DAC. This allows
easy quantization, but requires high resolution or you get quantization when
you don't want it, as well as when you do.

Dave Bradley
Principal Software Engineer
Engineering Animation, Inc.
daveb@...

> -----Original Message-----
> From: alt-mode [mailto:alt_mode@...]
> Sent: Sunday, May 21, 2000 4:17 PM
> To: motm@egroups.com
> Subject: Re: [motm] Silly question since the list is slow
>
>
> Ben,
>
> You still need some logic operators to count the step in the
> sequence, etc.  I think
> the only ICs in the entire Moog modular line were in the 960
> sequencer (perhaps in
> the sequential switch too).  These are very simple gate logic
> chips but that was all
> that really was in ICs in the 60s.
>
> So, while the output is analog, the control of an analog
> sequencer still requires
> some digital logic.
>
> Eric
>
> --- Ben Vehorn <ben@...> wrote:
> > I'm not sure I understand this part. As far as I know, there is nothing
> > digital about my Serge or Roland System 100 sequencers (but I could be
> > wrong). Care to elaborate?
> >
> > Dave Bradley wrote:
> >
> > > 5. Some modules in an otherwise analog modular synth are digital. A
> > > sequencer is by nature partly digital.
> >
>
>
> __________________________________________________
> Do You Yahoo!?
> Send instant messages & get email alerts with Yahoo! Messenger.
> http://im.yahoo.com/
>
> ------------------------------------------------------------------------
> Air purifiers, bedding, household cleaning & more! gazoontite.com!
> http://click.egroups.com/1/4195/5/_/529958/_/958943841/
> ------------------------------------------------------------------------
>
>