Bode Frequency Shifter VST

[afreshcupofjoe]

I imagine a similar trick is used to code it up using dsp? Or is it a completely different approach?

Fairly similar approach. The separation of the audio signal into real and imaginary components is done with 2 parallel allpass filters in both the analog and digital domains, commonly called a "phase differencing network" or Hilbert network. Scott Wardle wrote a paper in 1998 about how to create such an allpass network through the transformation of an elliptical filter. The math for that paper was over my head, so in 1999 I created a version based around the bilinear transform of an existing analog phase differencing network, from an old issue of Electronotes. This version made it into Csound, and I later ported it to Supercollider and Reaktor. The bilinear transform of an existing analog prototype seems like a more common approach nowadays.

The Moog/Bode patent has a complicated circuit for the quadrature oscillator. In the digital domain, quadrature oscillators are way easier - just a ramp oscillator that is waveshaped by sine and cosine (the actual realization is usually optimized beyond this simple description, but same idea).

Digital frequency shifters don't need a squelch circuit. This was an attempt to suppress feedthrough of the quadrature oscillator when there is no input signal, as analog ring modulators of the time had fairly poor performance. A digital ring modulator is a simple multiply - in the code, you just type "*" and you get great performance.

Sean Costello

Thanks for the insight Sean. Some of that was a bit over my head, but it was interesting nonetheless.

[WOK]

Took some time, but now nearly finished:

[blortblort]

looks purty!!! me wanna play!!!

[WOK]

Some noodling around while testing (inkl. delays, MIDI-envelope and envelope follower)
(#1 & #2 pure sine or triangle from external synth, #3 sequence with drums, #4 saw wave)
MP3-1
MP3-2
MP3-3
MP3-4

[camsr]

Thanks for the demos! I like the triangle sound wave going into this, I'm gonna have to try that also with valhalla

[WOK]

It's also possible to get more subtle effects by frequency shifting little as 0.1 Hz.
Synth chords with one saw OSC + some shifting, delay, LFO adjusting:
MP3

[WOK]

Release day is 25. Sept.
http://music.service-1.de/html/bode.html

[afreshcupofjoe]

No offense, but that seems like a steep price for a synthedit effect.

[WOK]

No offense, but that seems like a steep price for a synthedit effect.

What's the (price related) difference to an effect made in C++ ?
Or what's the difference to these:
http://www.kvraudio.com/get/2705.html
http://www.kvraudio.com/get/2297.html
http://www.kvraudio.com/get/3903.html
http://www.kvraudio.com/get/3927.html
http://www.kvraudio.com/get/4442.html
http://www.kvraudio.com/get/1819.html

Prize depends also on the effort / dev. time. And this one is not 5 default modules, hooked together on one sunday afternoon

[brok landers]

No offense, but that seems like a steep price for a synthedit effect.

What's the (price related) difference to an effect made in C++ ?
Or what's the difference to these:
http://www.kvraudio.com/get/2705.html
http://www.kvraudio.com/get/2297.html
http://www.kvraudio.com/get/3903.html
http://www.kvraudio.com/get/3927.html
http://www.kvraudio.com/get/4442.html
http://www.kvraudio.com/get/1819.html

Prize depends also on the effort / dev. time. And this one is not 5 default modules, hooked together on one sunday afternoon

it sounds terrific, and the price is perfectly ok for such a nice and indeed rare effect (actually i don't even recall any vst plugin that correctly emulates a bode shifter at all)...

[himalaya]

Great GUI and a sound to kill all alien invasions.
Somebody call Tomita.


*Bookmarked*

[afreshcupofjoe]

No offense, but that seems like a steep price for a synthedit effect.

What's the (price related) difference to an effect made in C++ ?
Or what's the difference to these:
http://www.kvraudio.com/get/2705.html
http://www.kvraudio.com/get/2297.html
http://www.kvraudio.com/get/3903.html
http://www.kvraudio.com/get/3927.html
http://www.kvraudio.com/get/4442.html
http://www.kvraudio.com/get/1819.html

Prize depends also on the effort / dev. time. And this one is not 5 default modules, hooked together on one sunday afternoon

I would say the same thing about all of those plugins, especially the Crysonic ones, which were originally sold under the promise that they were eventually going to be ported to C++, and I remember a big stink was raised when that didn't happen. There are a lot of other people trying to sell synthedit creations for lots of money. That doesn't change my opinion on the issue.

I really don't want to get into this argument again, so forget I said anything. Carry on. It's a nice plugin.

[blortblort]

Great GUI and a sound to kill all alien invasions.
Somebody call Tomita.


*Bookmarked*

(this one is on my short list now...)

[blortblort]

Short List got even shorter!
BFS is a blast, WOK!
Thanks for your work on this

[lockon stratos]

That's $45 stateside, kinda steep for a novelty effect (albiet a really cool one ) The only application i can see (pls dont flame me too bad) is as a DJ effect, and $45 is gonna find a better use.

No offence intended, looks great.