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


northerntao
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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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lud
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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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shred
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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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Re: Multiplier - polarizing VCA

Post by joncharliefeathers » Fri Oct 23, 2020 6:11 am

I have one and a low pass gate in this 2x 11FW synth voice. Tell me how you want it patched.

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???
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Re: Multiplier - polarizing VCA

Post by ??? » Fri Oct 23, 2020 7:55 pm

Well I'd be curious with anything, slow and audio rate modulator (3-4 octave higher than carrier). Random pitch on both carrier and modulator. Slow modulator sweep. I'd really like tonal stuff too. I'm very curious about this module! Also 2 modulator!

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Re: Multiplier - polarizing VCA

Post by BugBrand » Sat Oct 24, 2020 10:21 am

Yeah, I started doing some recordings but got a bit lost... did finish the LPG ones at least but that seemed a clearer remit (eg I tried with two modulators but frankly it was hard to convey what was going on!)

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Re: Multiplier - polarizing VCA

Post by joncharliefeathers » Sat Oct 24, 2020 10:27 am

A compact vco into the multiplier then on to the lpg. 2nd Compact vco in to multiplier on mod 1. Sine and looping env DC mixed to Penrose for pitch and gate out to hit input on LPG. That's the basic, followed by wave shaping and other changes all on the fly.
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multiplier.mp3
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???
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Re: Multiplier - polarizing VCA

Post by ??? » Sat Oct 24, 2020 1:28 pm

Hahaha cool love it!!! Thanks a lot!

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Re: Multiplier - polarizing VCA

Post by joncharliefeathers » Sun Oct 25, 2020 8:04 am

Thank you! I never tried ring modulation so was good to learn something new. There are some excellent tones to be found. And the second mod input on the multiplier was useful to introduce more bass punch together with some initial offset.

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