Quilcom V16: A 16 channel vocoder

[Spogg]

Hi all

I suspect that most stoners (Flow ones) make a Vocoder at some point in their addiction and this is Mr. Spoggs first one.

I had a lot of fun playing with this. I only made 3 presets with different centre frequencies because the first preset did what I wanted the best, to my old ears. It may be that my deep and manly voice is the issue and that a lady might benefit from alternative settings.

The envelope attack and decay and the resonance settings are inside the module because I found, experimentally, that there was an optimum setting which, when deviated from, only made the results inferior. This assumes that one is looking for the classic singing keyboard sound of course.

I added input level meters as an aid to routing the VST-saved version in a DAW. I found this tricky in Reaper but got there in the end. So, I've also upped the Reaper Project File which is ready to go when you have located the V16 and Quilcom Transformer synth (or whatever synth you want to use).

As always this is free to use and abuse and any type of feedback is greatly appreciated. Have fun!

Cheers

Spogg

PS I've tried to make the schematic a bit neater than my usual mess.
PPS In Flowstone the first attempt used 22% CPU then I tried out the Pack/Unpack Mono4 system and it went down to 6%. Very impressive reduction with no loss.

[martinvicanek]

Hi Spogg,

nice! I have always found the vocoder a fascinating device.
Your implementation would benefit from steeper filters. I have attached an example with eight 4-pole bandpass filters, each with a bandwidth of half an octave. You can easily add more filter units to cover a wider range. One trick is to invert the phase of every other filter in sequence to obtain better reconstruction.

Hope that helps!

[Spogg]

Wow Martin!
Your stuff makes me feel like a cretin
Seriously, that looks very interesting, plus I can use the display tool for checking out my own Vocoder core(s).
I will edit this post when I've had a decent chance to play with it.
One thing that particularly interests me is the idea of alternate band phase inversion. I assume this is to phase-cancel stuff out either side of the bands. I shall experiment...

Many thanks as always

Spogg

[Spogg]

I finally got around to making a new Vocoder using Martin's excellent innards.

See the Quilcom BlueSky Topic...

Cheers

Spogg