Multiplier - polarizing VCA

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BugBrand
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Multiplier - polarizing VCA

Post by BugBrand » Thu Sep 17, 2020 10:16 am

aka 4-quadrant multiplier or "ring-modulator"

Just added to the new site: https://www.bugbrand.co.uk/product/multiplier/

I had a bit of a hard time simply describing it!
When you use two modulation inputs along with the offset control you can do a lot at audio or sub-audio rates.

Effectively, you've got the sum of Initial + the 2 Modulations ---
when this sum is 0V you get zero output
when this sum is +5V you get x +1 amplitude output
when this sum is +10V you get x +2 output
when this sum is -5V you get x -1 output
when this sum is -10V you get x -2 output

Multiplier.jpg

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hollunderkurve
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Re: Multiplier - polarizing VCA

Post by hollunderkurve » Thu Sep 17, 2020 2:51 pm

this looks wonderful

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Re: Multiplier - polarizing VCA

Post by northerntao » Thu Sep 17, 2020 3:03 pm

Ah, you mentioned this was coming! Didn’t realize it was so quick!

Maybe next year! Have so much to explore with what I have!

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Re: Multiplier - polarizing VCA

Post by Kafgee » Thu Sep 17, 2020 4:22 pm

perfect timing ;)

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Re: Multiplier - polarizing VCA

Post by BugBrand » Thu Sep 17, 2020 4:34 pm

northerntao wrote:
Thu Sep 17, 2020 3:03 pm
Ah, you mentioned this was coming! Didn’t realize it was so quick!
It has actually been done for a month or two - I just wanted to complete the new website before putting it out + the general time chaos the last months.

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Re: Multiplier - polarizing VCA

Post by lud » Thu Sep 17, 2020 5:19 pm

Very interesting and intriguing design there Tom. Must sound crazy with 3 audio rate signals!?

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Re: Multiplier - polarizing VCA

Post by rpc » Thu Sep 17, 2020 8:12 pm

Looks great Tom! Can’t wait to hear what it can do!

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Re: Multiplier - polarizing VCA

Post by chrisdermo » Fri Sep 18, 2020 1:39 am

Hot diggity dog! Looks verrrrrry nice
WTB / WTTF: Bugbrand PRC2B, DD3, PRC4, ENV1

Current Bugs frame:
https://www.modulargrid.net/f/racks/view/580413

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Re: Multiplier - polarizing VCA

Post by chrisdermo » Fri Sep 18, 2020 1:43 am

On the old DD1 we have 2 ins and one out with a level control on each input, using the ‘RM’ setting would it be the same result as feeding the same signals to the yellow input and one blue input on this module? Or is the circuitry a bit different?
WTB / WTTF: Bugbrand PRC2B, DD3, PRC4, ENV1

Current Bugs frame:
https://www.modulargrid.net/f/racks/view/580413

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Re: Multiplier - polarizing VCA

Post by BugBrand » Fri Sep 18, 2020 4:09 am

Circuitry def a bit update but, yeah, similar ball park.

Effectively, you've got the sum of Initial + the 2 Modulations ---
when this sum is 0V you get zero output
when this sum is +5V you get x +1 amplitude output
when this sum is +10V you get x +2 output
when this sum is -5V you get x -1 output
when this sum is -10V you get x -2 output

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Re: Multiplier - polarizing VCA

Post by jjsynth » Fri Sep 18, 2020 4:52 am

Great looking module👍👍👍

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chrisdermo
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Re: Multiplier - polarizing VCA

Post by chrisdermo » Fri Sep 18, 2020 5:18 am

BugBrand wrote:
Fri Sep 18, 2020 4:09 am
Circuitry def a bit update but, yeah, similar ball park.

Effectively, you've got the sum of Initial + the 2 Modulations ---
when this sum is 0V you get zero output
when this sum is +5V you get x +1 amplitude output
when this sum is +10V you get x +2 output
when this sum is -5V you get x -1 output
when this sum is -10V you get x -2 output
:tu: :tu: :tu: thank you
WTB / WTTF: Bugbrand PRC2B, DD3, PRC4, ENV1

Current Bugs frame:
https://www.modulargrid.net/f/racks/view/580413

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Re: Multiplier - polarizing VCA

Post by shred » Fri Sep 18, 2020 8:28 am

looks great! would love to hear some sound samples if possible
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T. Jervell
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Re: Multiplier - polarizing VCA

Post by T. Jervell » Fri Sep 18, 2020 10:30 am

:party: Ooohhh..... nice one!!! Crossing my fingers I’ll find a way to incorporate this one in my system :hihi:

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Tajnost
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Re: Multiplier - polarizing VCA

Post by Tajnost » Sun Sep 20, 2020 7:49 am

Cool!

Wondering if it can work with clock signals (probably no, but... )?

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Re: Multiplier - polarizing VCA

Post by Sir Ruff » Sun Sep 20, 2020 11:48 am

Very nice! I understand that ring is possible with the dual VCA, but having a dedicated module is ideal.

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Re: Multiplier - polarizing VCA

Post by BugBrand » Mon Sep 21, 2020 4:01 am

Tajnost wrote:
Sun Sep 20, 2020 7:49 am
Cool!

Wondering if it can work with clock signals (probably no, but... )?
Yes - DC coupled, though inverted output would become 0 to -10V so possibly of little use?!

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chrisdermo
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Re: Multiplier - polarizing VCA

Post by chrisdermo » Fri Sep 25, 2020 9:05 am

Anyone received one of these yet? Wanna hear some samples!
One of these in conjunction with an LPG on percussion duties :omg:
WTB / WTTF: Bugbrand PRC2B, DD3, PRC4, ENV1

Current Bugs frame:
https://www.modulargrid.net/f/racks/view/580413

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