PLAN B analog blog

I've turned my attention to finalization of the Model 25 (now off the
bench and well into PCB design) and I'd like to let you in on some
fundemental changes from what was previewed at the Winter Namm show.

Before the top section (attenuator/waveshaper) was designed so that
when nothing was connected to it, it's output could be used as a
variable fixed voltage source, much like the Deopfer A-176.  As useful
as that is, I've come to feel that was a bit of a cop-out and have put
that configuration to better use. In the final production release of
the M25, when nothing is connected to the input of the
Attenuator/Waveshaper, the output will be normalled to a White Noise
source.  The pot will act as an attenuator.

I've also totally re-vamped the Ring Modulator.  Before I was doing
the multiplying using two 13700 VCA's.  I've now changed the basic
engine to a 1496 design configured as a dual-sideband multiplier. 
Much better.  Further, I've removed the done-to-death AC/DC select
switch and instead incorporated a unique cross feedback function which
is like no other out there. It's unique because it adds harmonic
content without introducing additional sidebanding. I think it sounds kind of interesting.

I've updated M25 page on the EAR site showing the new faceplate design
(subtle, but they're there) and added some audio examples of Ring, it's Feedback function and two others of the waveshaper.

enjoy (or not!):

http://www.ear-group.net/model_25.html

The Model 25 is part of the next wave of releases, along with the
Model 28A and B companion modules coming in July.

- P

great!
best regards,
Bakis.

--- "(i think you can figure that out)"
<peter@buzzclick-music.com> wrote:

> I've turned my attention to finalization of the
> Model 25 (now off the
> bench and well into PCB design) and I'd like to let
> you in on some
> fundemental changes from what was previewed at the
> Winter Namm show.
> 
> Before the top section (attenuator/waveshaper) was
> designed so that
> when nothing was connected to it, it's output could
> be used as a
> variable fixed voltage source, much like the Deopfer
> A-176.  As useful
> as that is, I've come to feel that was a bit of a
> cop-out and have put
> that configuration to better use. In the final
> production release of
> the M25, when nothing is connected to the input of
> the
> Attenuator/Waveshaper, the output will be normalled
> to a White Noise
> source.  The pot will act as an attenuator.
> 
> I've also totally re-vamped the Ring Modulator. 
> Before I was doing
> the multiplying using two 13700 VCA's.  I've now
> changed the basic
> engine to a 1496 design configured as a
> dual-sideband multiplier.
> Much better.  Further, I've removed the
> done-to-death AC/DC select
> switch and instead incorporated a unique cross
> feedback function which
> is like no other out there. It's unique because it
> adds harmonic
> content without introducing additional sidebanding.
> I think it sounds kind of interesting.
> 
> I've updated M25 page on the EAR site showing the
> new faceplate design
> (subtle, but they're there) and added some audio
> examples of Ring, it's Feedback function and two
> others of the waveshaper.
> 
> enjoy (or not!):
> 
> http://www.ear-group.net/model_25.html
> 
> The Model 25 is part of the next wave of releases,
> along with the
> Model 28A and B companion modules coming in July.
> 
> - P
> 
> 
> 
> 


Bakis Sirros - Parallel Worlds / Interconnected / Memory Geist
[Doepfer_a100] group owner
http://www.parallel-worlds-music.com
http://www.myspace.com/parallelworldsmusic
http://www.myspace.com/interconnectedmusic
http://www.myspace.com/memorygeist
http://www.DiN.org.uk
http://www.shimarecords.co.uk
http://www.rubber.gr
Athens-Greece


       
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--- In PLAN_B_analog_blog@yahoogroups.com, "(i think you can figure that out)" <peter@...> 
wrote:
> In the final production release of
> the M25, when nothing is connected to the input of the
> Attenuator/Waveshaper, the output will be normalled to a White Noise
> source.  The pot will act as an attenuator.

Good change. As long as you're going to have a noise source, any way you could squeeze in a 
jack for unattenuated noise?


> I've also totally re-vamped the Ring Modulator.  [...]  I think it sounds kind of interesting.

After listening to the examples, I agree, a nice character. 

-C