Doepfer

--- Dieter Doepfer <hardware@doepfer.de> wrote:
> From: "Dieter Doepfer" <hardware@doepfer.de>
> To: "Bakis Sirros" <synth_freak_2000@yahoo.com>
> Subject: Latest News
> Date: Mon, 3 Nov 2003 17:01:37 +0100
> 
> Our manufacturer informed us that the first lot of
> the new modules will be
> delivered on Wednesday:
> 
> A-107 Morphing Filter
> A-133 Dual VC Polarizer
> A-149-1 SOU I
> A-172 Maximum/Minimum
> A-167 Comparator / Subtractor / Offset Generator
> A-196 PLL
> 
> So the first of these module will be probably
> shipped next week (Roland
> resp. Matthias still have to make the final tests
> before the modules are
> sent to the customers). But the English manuals will
> be not yet available
> next week (only preliminary German versions).
> 
> The first prototype of the A-101-1 Vactrol Steiner
> Filter works perfect
> apart from the VC resonance/level control.
> Especially to have different
> input signals that appear simultaneously with
> LP/BP/HP behaviour at the
> output is really terrific. Compliments to Mr
> Steiner. And we found that the
> Vactrols are much faster than we assumed. Even for
> short attack times the
> filter frequency follows quite acceptable, or LFO
> frequencies up to ~ 30Hz
> can be used. As the modulation frequency goes beyond
> ~ 30Hz the filter
> modulation decreases as the LDRs inside the vactrol
> are not able to follow
> the fast LED brightness modulation any longer (the
> LEDs would be fast
> enough). At ~ 50Hz modulation frequency nearly no
> more modulation can be
> heard. Consequently no audio FM sounds will be
> possible with Vactrol based
> filters, but we have many other filters for this
> application.
> 
> The voltage controlled resonance works perfect too
> but so far we are not
> happy with our additional idea to control the level
> behaviour while the
> resonace increases (Res/Level Control on the
> preliminary front panel). Maybe
> we will omitt this feature (not the VC resonance !)
> or we find a solution.
> Our idea was to have an additional control that
> determines if the audio
> output level increases, decreases or remains
> approximately unchanged while
> the resonance changes.
> 
> Best wishes
> Dieter Doepfer
> 
> 
> 
> 


=====
Bakis Sirros
Parallel Worlds / Polariton
Athens-Greece
[Doepfer_a100] group owner
http://www.rubber.gr
http://www.ward12.com

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