Wiardgroup

i keep hearing about this , what does the Blacet VCO and Wiard have in
common.? i have read about this several times in several postings
....anyone ?

Electronotes-published VCO designed by --- In
wiardgroup@yahoogroups.com, dustin sedlacek <dustin.sedlacek@g...> wrote:
> i keep hearing about this , what does the Blacet VCO and Wiard have in
> common.? i have read about this several times in several postings
> ....anyone ?



Dustin,

Me being the one who was corrected the last time that this was brought
up - not much.  The Wiard is a Triangle-core VCO, more similar to the
Buchla 258 that the Blacet.

Here is a copy of what Grant says about the Blacet on Analog Heaven.

Gary Chang


> The Blacet VCO was designed with some tips from Grant and a
contributor to Electronotes (Terry?). The basic core is pretty much
the classic sawtooth engine with some further temp comp based on the
original EMU modular. Some original stuff includes the VC octave
switching and calibration circuit and the VC waveform.

Terry Michael (formerly Terry Mikulic) when he was a teenager,
contributed a significant number of the core circuits published in
Electronotes magazine (something like 50%, including the first state
variable VCF using OTAs EN#33 Pg. 5, and EN#34 Pg. 16,17).

In particular, Terry perfected and published the "classic sawtooth
engine".  While sawtooth reset designs had been published by Michael
Suchoff (EN#49 Pg. 11) and Paul Titchener (EN#57 Pg. 8), Terry's
design (EN#62 Pg. 14 Feb. 1976) is the most widely copied.

This design was picked up from Electronotes magazine by the engineers
at Moog Music Inc. and others. The design forms the basis for the VCOs
used in the Micromoog, Source, Prodigy and the other small Moog synths.

No money or acknowledgment was ever paid Terry for the design. It was
not legally required, since by publishing the design (at 22) he placed
it in the public domain.

Terry continued to improve the design over the next 25 years, and I
connected John Blacet with Terry Michael's updated and improved
sawtooth engine. This design is technically superior to the VCOs used
in the Moogs and all other copies of Terry's older design.

Unfortunately, John apparently did not realize that Terry is the
originator of the "classic sawtooth engine" and the other VCOs he
studied were copies of Terry's "first" design.

LUCKILY, in spite of the confusion, John Blacet kept the important
parts of Terry's new design and they appear in the Blacet VCO!

To summarize:

The Blacet VCO is the only commercial version of Terry Michaels
"improved sawtooth engine" (remember the old inferior version sold
something like 50,000 copies).

The Blacet VCO is the ONLY version of the "sawtooth engine" officially
licensed from the originator of the design.

Best Regards,

Grant Richter
Wiard Synthesizer