david correia put forth the notion
:
In article ,
david gourley wrote:
Ian Thompson-Bell put forth the notion
:
Dec [Cluskey] wrote:
On Mar 26, 3:43 am, Romeo Rondeau wrote:
The first Eventide Harmonizer came out in the mid 70's. It wasn't
until
the H3000 that it was totally abused, a crime that I'm guilty of
as well. :-)
Romeo
That comes as a shock!
I am sure I can remember using the unit as the Industry Standard
for ADT [Automatic Double Tracking] in the mid Sixties and then
through the seventies, Eighties. Perhaps Decca Studios in the UK
[West Hampstead, London] had a pre launch version ..... or it was
on test?
According to the eventide web site their first harmonizer came out
in the mid 70s. Prior to that they made the Instant Phazor and
Instant Flanger. They did not start as a business until 1970 so I
doubt you would have heard them in the 60s.
Cheers
Ian
Right - IIRC, Richard Factor started that company and they had one of
the first digital delay lines. It was stepped and had very short
delay times. The Instant Phaser and Flanger were analog products,
using all pass filters and BBD devices, respectively. As the
technology improved, the Harmonizers(tm) started appearing. Even my
949 is a primitive bit- slice design, using LM1496 sideband modulator
chips.
david
I still have my early 80's 949. In fact I used it yesterday to
stereo-ize a mono keyboard sound. It sounded great. What a nice box to
have around.
I remember opening the lid in the mid 80's when it went down, to see
if I could find something obvious. I remember finding a mass of
wiring, like it was packed with spaghetti. I immediately put the
screws back on the lid and sent it back to the factory.
I have always been curious how they got it to work with the technology
of the day. Anyone care to describe it for a simple mind like me?
David Correia
www.Celebrationsound.com
The core of the unit basically uses sideband generators, which is more of
a radio design technique. If you listen to a single-sideband radio
broadcast slightly off-frequency, you'll immediately hear the artifact in
a raw form.
The rest of the circuit, outside of the A/D stuff, involves a quadrature
oscillator and 4 bit-slice processor design to handle the math. I'm sure
Scott could articulate this better than I could, though.
david