PLAN B analog blog

so does that mean, that the 5 volts will drop
to ground and then back to the new value, whenever
the panning parameter is changed?
i never discovered that on the a132.
i guess i misunderstand something.

the more i think about technical issues, the more i see
that i don't understand what's going on electrically ;-)

best wishes

ingo




--- In PLAN_B_analog_blog@yahoogroups.com, Peter Grenader 
<peter@b...> wrote:
> When VCAs gate the control voltage, if for instance the control 
voltage is
> static - let's say a steady 5 volts, the attenuation effects that 
static
> level by rising up as the CV fades into one of the output channels 
and then
> tapering down as it decays to another output channel.  To each of 
the output
> channels of the panner, it would effectively be like turning a 
voltage pot
> from ground up to 5 volts then back down again to ground, so it 
that regard
> it acts like a slew.
> 
> If the pan is immediate -  if it jumps instantly from one output to 
another
> then this slew is minimized - the net effect is like an analog 
switch. A
> clean break if you will.  But as the movement from one channel to 
another is
> gradual, the slewing effect will be noticeable.  This may not be a 
bad thing
> mind you, but it is an unavoidable attribute of gating control 
voltages.
> 
> - P
> 
> 
> 
> selfoscillate wrote:
> 
> > 
> > 
> > 
> > hello peter,
> > 
> > hmm i really don't know. actually i use linear vca's
> > like the a132 or blacet dual vca for panning of control
> > voltages and that seems to work fine. these can process
> > both audio and cv without problems. can you please explain
> > the difference between your panning vca and devices like
> > a132 and the blacet dual vca? sorry if this is a dumb question ;-)
> > 
> > best wishes
> > 
> > ingo
> > 
> > 
> > 
> > 
> > --- In PLAN_B_analog_blog@yahoogroups.com, "(i think you can 
figure
> > that out)" <peter@b...> wrote:
> >> 
> >> Well, it could, but there is a problem with this idea one must
> >> consider:
> >> 
> >> In order to pan audio, to avoid clicks and dead spots one needs
> >> the transistion to be gradual, even if ever-so-slightly.  This is
> > fine 
> >> for an audio signal.  For a control voltge however, this
> >> dramatically changes the control voltage being panned, much
> >> like the effect when one gates a DC thorugh a lowpass gate - the
> >> vactrol makes for a really nice ring of the audio due to the fact
> >> those devices close down slowly - with a CV however you get the
> >> very same effect as running the CV through a slew.
> >> 
> >> Any thoughts on this?
> >> 
> >> - P
> >> 
> >> 
> >> 
> >> 
> >> --- In PLAN_B_analog_blog@yahoogroups.com, "selfoscillate"
> >> <synaptic_music@y...> wrote:
> >>> 
> >>> 
> >>> hello peter,
> >>> 
> >>> i'd love that vc quad panner too, but it should be
> >>> able to handle dc voltages and not only audio.
> >>> 
> >>> best wishes
> >>> 
> >>> ingo
> >>> 
> >>> p.s. nice idea to start a dedicated plan b group :-)
> >>> 
> >>> 
> >>> 
> >>> --- In PLAN_B_analog_blog@yahoogroups.com, "(i think you
> >> can figure 
> >>> that out)" <peter@b...> wrote:
> >>>> 
> >>>> VC Quad panner as a stand alone sounds like a great idea,
> >>>> actually.  Let me give that some serious thought.  Again, if
> >>>> enough people say 'yeah', it's a win win for everybody.
> >>>> 
> >>>> Thanks for this (good) idea.
> >>>> 
> >>>> - P
> >>>> 
> >>>> --- In PLAN_B_analog_blog@yahoogroups.com, Robert
> >>>> Hoffman <robmix@e...> wrote:
> >>>>> Maybe there's two separate modules, the Balanced Stereo
> >>>> Output, which 
> >>>>> I'm all for - sign me up, and a VC Quad panner.
> >>>>> 
> >>>>> Rob
> >>>>> 
> >>>>> 
> >>>>> 
> >>>>> On Monday, October 4, 2004, at 01:17 PM, Johan Boberg
> >> wrote:
> >>>>> 
> >>>>>> About the proposed Balanced Stereo Output Processor,
> >>>>>> it looks really useful, i would really like to have one.
> >>>>>> 
> >>>>>> But i would really love to have it somehow patchable as a
> >>>>>> Quad Output Processor if possible. It could still be used
> >>>>>> as a stereo out if this is preferred. I don't know exactly
> >>>>>> what it would take to convert your design into this without
> >>>>>> changing it too much though...
> >>>>>> 
> >>>>>> /Johan
> >>>>>> 
> >>>> 
> >> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> >>>> ~~~~~~~~~~
> >>>>>> Johan Boberg                              
> >>>> http://www.eam.se
> >>>>>> 
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