[sdiy] Idea - Triangle wave DCO core

[Tom Wiltshire]

Yeah, I've always been curious about that "Metal" setting too. I came across it in my research into DCOs and never did find out what the hell it really is.

And Florian's got a point that the classic ramp DCO makes doing Sync very easy. But many DCO synths never used the feature, so how much of an advantage it really is is a matter of taste.

To be honest, I don't know that I think a triangle DCO is really that useful. It was more that the very simple hardware occured to me, and I wondered if it had ever been done in any form.

Tom


On 14 Mar 2012, at 12:16, Richie Burnett wrote:

> Florian, have you ever worked out how the "Metal" setting on the JX-3P works?  I haven't sat down and figured it out, but I'm guessing it's something like that the master resets the slave's integrator state but doesn't reset it's digital counter as well.  Or maybe the other way around: The master resets the slave's digital counter, but doesn't reset the integrator state back to zero?
> 
> I remember looking at JX-3P waveforms on a scope some time ago, and seem to remember that the sawtooth waveforms reset back to the middle of the ramp rather than the bottom when sync'ed.  All seemed very odd.
> 
> -Richie,
> 
> ----- Original Message ----- From: "Florian Anwander" <fanwander at mnet-online.de>
> To: "synthdiy diy" <synth-diy at dropmix.xs4all.nl>
> Sent: Wednesday, March 14, 2012 12:05 PM
> Subject: Re: [sdiy] Idea - Triangle wave DCO core
> 
> 
>> Hello Tom,
>> 
>> How would you achieve hard synchronization with a free running external source?
>> The classic programmable counter based Roland DCO has the advantage, that it can be reset/hardsync very simple.
>> 
>> Florian
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