Analog sequencer question...

[Goddard, Duncan]

I've played with this, using the simple sequencer in the yamaha cs30 as a
model.... as long as there's an appreciable edge to the clock, the counter
will run. by varying the pulse-width, you have a neat way of controlling
gate-duration which can be passed on to the synth envelopes as-is. going
further, you could actually use the counter to step through different values
of pulse width and have all the steps of your sequence have their own
durations. so as long as you stay within the (experimentally determined)
limits of what will run the counter, no problem. never seen this on a
commercial unit, though- don't know why, it's simple enough.

> ----------
> From: 	Christopher Randall[SMTP:chris at positronrecords.com]
> Sent: 	04 August 2000 03:42
> To: 	synth-diy at node12b53.a2000.nl
> Subject: 	Re: Analog sequencer question...
> 
> Thanks to everyone for your help. I think I pretty much got this beat.
> It's
> just a matter of getting the right combination of resistor values, at this
> point.
> 
> In that light, I do have one question though, before I start building:
> 
> How important is the low or off time coming from the 555? I tried it with
> no
> resistor at all, and the 4017 steps fine, but I imagine that will cause me
> trouble down the road with whatever device I plan to trigger. Basically,
> what ratio of high time to low time is acceptable?
> 
> Sorry if that seems like a simple and/or dumb question, but I've only
> recently jumped in to the modular world, and am not wise to some of the
> ancient lore...
> 
> - Chris Randall
> - http://www.positronrecords.com
> 
> 


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