From Mr. Dave Smith:
"The analog
oscs are not voltage controlled for frequency, so they don't have the tuning
problems. The timing is ultra-precise and comes from the DSP. The waveshapes are
real analog, tho - only the timing is digital. For example the pulse width is
voltage controlled. So, all the good parts of analog oscillators are there
(imperfections, slight shape changes over frequency, etc), just no tuning
hassles."
----- Original Message -----From: Miles BaderSent: Monday, March 28, 2005 12:16 AMSubject: [Evolver] Re: Polyvolver KB vs. A6On Mon, 28 Mar 2005 03:12:08 -0000, afro_88 <afro88@...> wrote:
> I always thought it had 2 VCO's and 2 DCO's
Well the 2 digital/wavetable oscs are neither DCOs or VCOs, as those terms
are usually used. [My definition of the term DCO is "an analogue
wave-shaper running off a digital clock".]
As I recall, the analogue chips in the Evolver were originally designed for
the Marion synth line, and the oscillators were termed "HRO"s -- "High
Resolution Oscillators"; everything I've seen on these has been a bit vague
about what the actually underlying implementation is. Even DSI's FAQ
dodges the issue by using the term "analogue oscillator waveshapes" rather
than "analogue oscillators" in the answer to the "Is the Evolver analogue
or digital?" question.
Anybody put their Evolver chips under a microscope? :-)
> I have no idea what DSI has done to keep it all in tune so well, but I
> am certain the 2 "analogue" oscillators are in fact VCO's. They
> certainly sound warmer than my G2's oscillators.
DCOs are allowed to sound warm too... :-)
-Miles
--
In New York, most people don't have cars, so if you want to kill a person, you
have to take the subway to their house. And sometimes on the way, the train
is delayed and you get impatient, so you have to kill someone on the subway.
[George Carlin]