Waveulator ME Saturator Construction Information

[mediatechnology]

After playing with values for a bit. Something like 4.7uF to 20uF is a good range...

You might want to have a look at the synthesized variable capacitor I use for the Unocompressor.

https://proaudiodesignforum.com/forum/p ... 714#p17714

That circuit could be used to synthesize a variable 4.7 to 20 uF cap controlled by a pot.

As shown the range is 2.2 to 22 uF.

[Script]

Anyone ever tried adding the variable capacitor to this circuit?

[mediatechnology]

I haven't but I did have a client add a small-value one, not variable, at the rectification node.

The variable capacitor that I think you may be referring to may be one similar to the one I used in the UnoCompressor.

[Script]

Yes, that's the one.

Unlike the Uno, the Waveulator does not link for stereo after the rectifier, so it would need two circuits for L and R.

Also, with the Uno, the "Variable RMS" circuit and pot is wrapped around a follower. But it's not the same to just pick the signal from the output of IC9A and IC10A of the Waveulator, right?

So would need to lift pins 3 and insert dual op amp there on the Waveulator?

[Script]

On the other hand, inserting a variable Att/Rel circuit into the Waveulator... I think that would defeat the purpose and strength of the Waveulator -- zero latency to shave off transients, like brickwall peak limiter.

[mediatechnology]

On the other hand, inserting a variable Att/Rel circuit into the Waveulator... I think that would defeat the purpose and strength of the Waveulator -- zero latency to shave off transients, like brickwall peak limiter.

That's why I never tried it.

Adding a variable cap at that node, if the range isn't really large, will make it a zero attack variable release limiter. With larger value caps some attack time would be added due to the finite current available to charge the cap.

When I have one on the bench soon I'll try it and see how it sounds.

[mediatechnology]

I just updated the schematic, assembly instructions and Mouser Project Manager for the Waveulator in the first post.

R64 and R65 values were changed to make the meter "V" voltage output equal to 2.4V for 5 dB gain reduction.
10 dB GR is approximately 4.8V at the "V" Phoenix connector output.
When used with a GR20 board, switching a 10K in series with the bargraph input raises the full scale value to 10 dB.
(The bargraph has a 10K input resistor; the series resistor introduces a voltage divider.)

[emrr]

Thanks Wayne!