--- Dieter Doepfer < hardware@... > wrote:

> From: "Dieter Doepfer" < hardware@... >
> To: "Bakis Sirros" < synth_freak_2000@... >
> Subject: AW: 1 A149-1 Question
> Date: Mon, 2 Jun 2003 20:21:20 +0200
>
> > -----Urspr�ngliche Nachricht-----
> > Von: Bakis Sirros
> [mailto: synth_freak_2000@... ]
> > Gesendet: Mittwoch, 28. Mai 2003 23:46
> > An: dieter doepfer
> > Betreff: Fwd: 1 A149-1 Question
> >
> >
> >
> > --- ethanzer0 < ethanzer0@... > wrote:
> > > To: Doepfer_a100@yahoogroups.com
> > > From: "ethanzer0" < ethanzer0@... >
> > > Date: Wed, 28 May 2003 18:03:52 -0000
> > > Subject: 1 A149-1 Question
> > >
> > > hey Bakis,
> > >
> > > If you get a chance to ask Dieter
> > > about the A149-1 I am curious if
> > > he is planning on using vactrols
> > > in the design. And, tell him I am
> > > impressed by graphic design choice
> > > for the front panel as it looks just
> > > like the graphic from the Buchla 266.
> > > I'm sure it will be a hot item once
> > > available.
> > >
> > > Cheers!
> > >
> > > Ethan
>
> The section of the Buchla SOU that is "emulated" by
> the A-149-1 does not
> include vactrols. Vactrols are included only in the
> "Fluctuating Random
> Voltages" section. One vactrol is used in the
> rectangle VCLFO (made with a
> 555 type timer and a VCR that controls the frequency
> of the rectangle
> frequency). Another in the slew limiter. All VCRs
> are controlled by the same
> illumination consequently both the LFO frequency and
> the slew time are
> controlled simultaneously. Look at the A-100 patch
> that simulates the
> "Fluctuating Random Voltages" section of the Buchla
> SOU to understand the
> details.
>
> In case that we will develop a module that simulates
> the "Fluctuating Random
> Voltages" section we will see if we use the vactrol
> or OTA solution (OTA
> means Operational Transconductance Amplifier, this
> is c current controlled
> amplifier, a bit similar to a VCA). But from the
> current state we cannot see
> an advantage for the vactrol solution compared to
> the OTA solution (in
> contrast to vactrol based VC filters and VC
> amplifier).
>
> Best regards
> Dieter Doepfer
>
>

=====
synthfreak(parallel worlds)
athens-greece
1 group owner

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