Ring (and/or Balanced) Modulation for the modulator masses

[alexsga]

[Chankgeez]

[youtube]http://www.youtube.com/watch?v=JqmCE22tCPo[/youtube]

https://www.youtube.com/watch?v=JqmCE22tCPo

[lordgalvar]

Bandpass!

Sounds good!

[Chankgeez]

[youtube]http://www.youtube.com/watch?v=WrTwHZxmcqE[/youtube]

https://www.youtube.com/watch?v=WrTwHZxmcqE

[lordgalvar]

Some links:

I always wondered if the 200e freq shift ring mod was analog. Looks like digital carriers with analog signal: https://www.muffwiggler.com/forum/viewt ... 9582756379

Speaking of frequency shifting, Todd Barton is in the case: https://www.instagram.com/p/BqCiDemFSmX ... v3feepdpdd

And Chankgeez showed me this fancy guy:
http://synthworld.blogspot.com/2015/05/ ... ation.html
And a sound sample: http://theshamblers.blogspot.com/2011/1 ... emolo.html (SoundCloud link near bottom)

Ring Mod shout-out featuring The Vermona, bitrman, mf-102: http://www.dubbhism.org/2010/02/ring-mo ... er-mf.html

More shootouts: http://ernstvanderloo.com/?p=24

And if that isn't enough, how about a spendy X Japan ring mod: https://reverb.com/item/11851554-free-t ... japan-rare I think it's for violin though.

[youtube]http://www.youtube.com/watch?v=YLk7dufzZVs[/youtube]
http://www.youtube.com/watch?v=YLk7dufzZVs

[youtube]http://www.youtube.com/watch?v=jtrgWf5JjL8[/youtube]
http://www.youtube.com/watch?v=jtrgWf5JjL8
haha, I was at this show

(I've never found an x Japan song that I can pick out ring mod though...but I haven't listened to everything )

[lordgalvar]

[youtube]http://www.youtube.com/watch?v=WrTwHZxmcqE[/youtube]

https://www.youtube.com/watch?v=WrTwHZxmcqE

Nice!

I missed out on that one...

Still got my v1

Back to frequency shifting...
I think the dome filter is used when in inserting an external wave. The dome filter creates a phase shift/cancel of the external wave. The signal is balanced modded against the 0 degree external wave and then demodulated by the dome filter output to cancel either the phase of the lower or upper frequency shift. I think the Bode and Haible work on this idea.

If there is no external input, I don't think you need the dome filter...just a quadrature oscillator which is what I think the buchla 100 patch and 360 systems patches are based on. I think the buchla just uses an external phase shifter to create the quadrature oscillator...his ring mod design is a bit different and based on matched pairs or transistors (like the Carlin). The 360 20/20 looks like it used two mc1496 (may be wrong) to mod/demod.

It's all guessing at this point though.

If a digital digital oscillator with quadrature output and some ad633 or other modern chips are used, a compact design may be possible. The modern chips may be a needed to keep everything balanced for perfect cancellation....don't know their tolerances and how hard it would be to match or trim?

[lordgalvar]

IMG_20181129_115009.jpg (56.3 KiB) Viewed 3208 times

IMG_20181129_115018.jpg (60.88 KiB) Viewed 3208 times

Metro Modular MM315 Balanced Modulator.

Features:

• -MC1595L based balanced modulation
  -No internal carrier
  -10hp Doepfer 3U Eurorack format
  -Input Level for both Carrier and Modulator
  -AC and DC offset levels
  -4 jack multipule, 2 extra attenuators
  -Well balanced, elegant, and simple

[youtube]http://www.youtube.com/watch?v=gNt0OqxSc5Y[/youtube]
http://www.youtube.com/watch?v=gNt0OqxSc5Y
∆AC coupled sounds:

• -Tremolo drum sounds throughout (more at beginning and end).
  -Balanced mod against phased signals from same oscillator (approx. 2:13 start)
  -Audio rate modulation of audio sample (scattered around the middle)
  -Some additional non-ring mod sounds scattered to fill space

[youtube]http://ww.youtube.com/watch?v=QeaG8d8uT64[/youtube]
http://ww.youtube.com/watch?v=QeaG8d8uT64
∆Audio rate sounds:

• -Balanced Modulation of two oscillators
  -Oscillator vs. Radio
  -Radio ring mod stuff got layered over
  -Feedback sounds are oscillator balanced modulated against itself with the same waveform
  -All Sounds from mm315 (with a boss re-20 tacked on)

[youtube]http://www.youtube.com/watch?v=57ei6DTF5TQ[/youtube]
http://www.youtube.com/watch?v=57ei6DTF5TQ
∆DC offset sounds:

• -Complex cv modulation by combining several different LFOs and envelopes via balanced modulation to control amplitude, harmonics, phase and other stuff
  -More of a utility thing than fun

Maybe guitar video?

[Chankgeez]

[Chankgeez]

Looks like a nice Blue Ringer in case anyone's interested:

https://reverb.com/item/17346509-frostw ... -modulator

[Chankgeez]

Believe there's a frequency shifter in this here jam:

[youtube]http://www.youtube.com/watch?v=ELG0ujI7zqY[/youtube]

https://www.youtube.com/watch?v=ELG0ujI7zqY

[youtube]http://www.youtube.com/watch?v=ftyw5_hX4H0[/youtube]

https://www.youtube.com/watch?v=ftyw5_hX4H0

[MrNovember]

Wait, wait, wait, wait...what do you mean new Blippoo Box? I've been on the wait list for a Blippoo Box for years!

[Chankgeez]

I just post 'em as I find 'em.

Also, more frequency shifter:

[youtube]http://www.youtube.com/watch?v=yWIs3gJCDew[/youtube]

https://www.youtube.com/watch?v=yWIs3gJCDew

[lordgalvar]

I think Hordjik has a frequency shifter too. Todd Barton has been messing around with it a lot. (There is a link to an Instagram post up there too). Could be some other 4u make but I think Barton said it was Horjik

[Pladask]

Linear frequency shifting / single sideband modulation is awesome and quite easy to do digitally as you don't need to do all the component matching for the dome filter. Here's a bit of code that spinsemi offers for free that does the dome filtering and multiplication + summing/subtraction for isolating the sidebands. Just skimmed the last page so probably mentioned already, but IIRC the math is:

[Carrier (at 0 degree shift) * sinus modulator] + [Carrier (at 90 degree shift) * cosine modulator] = upper sideband

[Carrier (at 0 degree shift) * sinus modulator] - [Carrier (at 90 degree shift) * cosine modulator] = lower sideband

[lordgalvar]

Yeah, digitally. Like ring modulation, it's easier.

I think some of this is just the exotic challenge of the analog realm. There ain't many analog frequency shifters. There are some digital ones out there though (koma, synthesis tech, Alexander, Sputnik, probably some in those eurorack multifx). Analog, just the buchla and analog systems currently in production...Sputnik never released their licenced version of the Haible (nor has synthcube who owns the production rights at the moment since his passing).

And Joel from Chase bliss read my off handed comment about what a chase bliss ring mod would be...and it would be a frequency shifter haha.

Just havin' fun and ramblin'. Ain't nothin' serious.