[sdiy] Panning in Quad Resources and Docs

Dakota Melin dksynth at gmail.com
Mon Apr 20 21:20:43 CEST 2020


Yes, quite a bit of crossover with the Planar, but I’m not looking for a
finished module or eurorack, I’m looking to get a grasp on the concepts to
incorporate the ideas into some of my own pieces.

The quadrant CVs look like this on the Planar plotted against X and Y?

https://i.imgur.com/SHWqBB0.png

(Except I think I may have lettered my quadrants starting at a different
spot?)

On Mon, Apr 20, 2020 at 2:14 PM David G Dixon <dixon at mail.ubc.ca> wrote:

> That sounds an awful lot like the Intellijel Planar, which I designed back
> in 2012.  The only thing is that it is not “equal power” but it could be
> modified to be that, or very close to that, by changing one resistor.
>
>
> ------------------------------
>
> *From:* Synth-diy [mailto:synth-diy-bounces at synth-diy.org] *On Behalf Of *Dakota
> Melin
> *Sent:* Monday, April 20, 2020 9:50 AM
> *To:* ulfur hansson
> *Cc:* synth-diy mailing list
> *Subject:* Re: [sdiy] Panning in Quad Resources and Docs
>
>
>
> Hi,
>
> nice to hear someone is interested :) quad lives!
>
> A scanner is one way to do it but the person I have in mind for this is
> more interested in gestural motions so dual voltages for X, Y positioning
> is more convenient I think.
>
> I'm happy to chat about the fundamentals of the idea, the circuit itself
> is not really finished yet.
>
> What I'm playing with right now derives "quadrant" voltages from joystick
> X and Y inputs to control 4 VCAs that would be for Front Right, Rear Right,
> Rear Left and Front Left speakers. There is equal power breakpoint panning
> between adjacent channels. The equal power law is adjustable, I'm not sure
> which would be most appropriate yet (-3dB, -4.5dB, -6dB). Single-axis
> panning goes down to full closed in the center and back up when going
> straight across. Controlling it with a joystick, joystick straight forward
> sound would come out of both front speakers at a slightly reduced
> amplitude, rotating joystick to the right it would come out stronger out of
> only the front right speaker, and as you continued to rotate around it
> would crossfade smoothly from speaker to speaker.
>
> here is the simulation fully rotating around:
> https://imgur.com/a/gpEKb8V
>
> and here is the simulation of single axis front-to-back motion:
> https://imgur.com/a/Pt6SyTf
>
> best,
> -dk
>
>
>
>
>
>
>
>
>
> On Mon, Apr 20, 2020 at 10:49 AM ulfur hansson <ulfurh at gmail.com> wrote:
>
> i'd be highly intrigued in learning more about this subject as well. it
> would basically need an equal power interpolating scanner?
>
>
>
> if you are willing please share!
>
>
>
> many thanks,
>
> -úlfur
>
>
>
> mán., 20. apr. 2020 kl. 01:58 skrifaði Dakota Melin <dksynth at gmail.com>:
>
> Hi everyone,
>
>
>
> I've been playing around with some ways to pan signals in quad systems
> this weekend and I'm looking for resources on the subject.
>
> https://i.imgur.com/3UIU7gG.png
>
> Serge T mentioned a CalArts paper on the subject by Darrell Johansen. I
> would be interested if anyone knows where to find a copy of that for me to
> read, or anything else that may be relevant.
>
> best,
>
>
>
> -dk
>
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>
> --
>
>>
> ulfurhansson.com
>
> cargocollective.com/ulfur
>
> instagram.com/ulfur_
>
> .•°~ Úlfur - Arborescence on Spotify
> <https://open.spotify.com/album/118CEJliIg47Jcr70y7Kww>
>
>
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