Re: [AH] Why isnt everything 1 v/o ?

From Jason Proctor
Sent Sun, Sep 29th 2019, 17:34

Well of course, but that's true of any voltage. The point is that the
level input has no way of interpreting a 1v/oct protocol in the way
that an exponential pitch input does.

On Sun, Sep 29, 2019 at 10:31 AM DJ Maytag <xxxxxxxx@xxxxxxxx.xxx> wrote:
>
> You could route 1V/oct to the Dual ADSR=E2=80=99s level controls. The hig=
her the pitch, the stronger the effect of the envelope.
>
> http://www.instagram.com/djmaytag
> http://www.soundcloud.com/djmaytag
> https://choon.co/artists/djmaytag/
>
>
> ________________________________
> From: Jason Proctor <xxxxx@xxxxxxx.xxx>
> Sent: Sunday, September 29, 2019 12:08 PM
> To: DJ Maytag
> Cc: John Emond; Quincas Moreira; Tristan; Dustin Sedlacek; Analog Heaven
> Subject: Re: [AH] Why isnt everything 1 v/o ?
>
> I don't see any mention of 1v/oct in the Dual ADSR docs. The level
> input is a linear input to the output VCA. Some looping envelopes have
> 1v/oct inputs to use them as VCOs, but although the Dual ADSR does
> loop, it doesn't have any CV control of envelope timings.
>
> Perhaps OP can give us some indication of what he might expect from
> 1v/oct on inputs other than exponential VCO/VCF etc?
>
> On Sun, Sep 29, 2019 at 8:34 AM DJ Maytag <xxxxxxxx@xxxxxxxx.xxx> wrote:
> >
> > I=E2=80=99m pretty sure that=E2=80=99s 1V/oct modulating ENV amount and=
/or timing, as I mentioned. Now that I think of it, I think there=E2=80=99s=
 an input to Intellijel=E2=80=99s Dual ADSR that could be used to scale the=
 ADSR intensity by sending it 1V/oct.
> >
> > http://www.instagram.com/djmaytag
> > http://www.soundcloud.com/djmaytag
> > https://choon.co/artists/djmaytag/
> >
> >
> > ________________________________
> > From: John Emond <xxx.xxx@xxxxxx.xxx>
> > Sent: Sunday, September 29, 2019 10:21 AM
> > To: Quincas Moreira
> > Cc: DJ Maytag; Tristan; Dustin Sedlacek; Analog Heaven
> > Subject: Re: [AH] Why isnt everything 1 v/o ?
> >
> > What about Keyfollow on the Jupiter 8 envelopes?
> >
> > Cheers,
> >
> > John
> >
> > On Sep 29, 2019, at 9:17 AM, Quincas Moreira <xxxxxxx@xxxxx.xxx> wrote:
> >
> > 1v/oct is a standard for tuning pitches. That makes sense in exponentia=
l inputs of VCOs and VCFs, everything else is simply measured in voltages, =
and sometimes the response curve, like log, lin or expo. In my experience m=
ost cv outputs in eurorack 10vpp, being 0 to 10v if positiv only, and -5 to=
 +5 if bipolar, though there are plenty that output double that (-10 to 10)=
. Inputs often can be set to respond linearly or log/expo and often go thro=
ugh attenuverters. And a system is never complete without utilities for con=
ditioning voltages to what you need. I have quite a few voltage processors =
myself which I use for attenuation, inversion, offset, amplification, mixin=
g etc...
> >
> > Sent from my iPad
> >
> > On Sep 29, 2019, at 12:09 AM, DJ Maytag <xxxxxxxx@xxxxxxxx.xxx> wrote:
> >
> > The only use I could see for a 1V/oct input on a VCA is if you want som=
e intentional bleed/droning as you play higher up on the keyboard.
> >
> > The second use wouldn=E2=80=99t be on the VCA itself, but on an envelop=
e/ADSR controlling a VCA. The higher the pitch, the shorter the overall env=
elope timing.
> >
> >
> >
> > http://www.instagram.com/djmaytag
> > http://www.soundcloud.com/djmaytag
> > https://choon.co/artists/djmaytag/
> >
> >
> > ________________________________
> > From: Tristan <xx@xxxxxxxxx.xxx.xx>
> > Sent: Saturday, September 28, 2019 8:26 PM
> > To: Dustin Sedlacek
> > Cc: Analog Heaven
> > Subject: Re: [AH] Why isnt everything 1 v/o ?
> >
> > I presume by 1 v/o you mean 1 volt per octave. While this makes sense f=
or oscillator or filter cutoff
> > frequency it does not necessarily make sense for a VCA or other module =
without a common unit of
> > calibration. A VCA could have a logarithmic, linear or other non-linear=
 control law for the gain. To calibrate
> > a logarithmic control to 1V/6dB gives a gain range of 60dB over the typ=
ical 0-10V control source range
> > which is not adequate to fully cut off the sound. To allow for this a V=
CA will often have a voltage mixer for
> > the input control voltages to allow them to be scaled to the desired co=
ntrol depth.
> >
> > /Tristan
> >
> > On Sun, Sep 29th, 2019 at 10:29 AM, Dustin Sedlacek <xxxxxx.xxxxxxxx@xx=
ail.com> wrote:
> >
> > > Every time I talk to eurorack guys about 1 v/o VCA or wavefolder they=
 don't
> > > seem to understand why anyone would want that.
> > >
> > > Isnt control the thing that everyone wants?
> > >
> > > What about 1v/o inputs are not desirable? Is their something I am not
> > > understanding?
> > >
> >
> >
> >