Resonant Lopass Gate PCB's (New Batch 4/29/12)

[fonik]

i put the whole module together last night. it is working quite nice.
and arrgh... i recognized a mistake in the truthtable which is on my frontpanel now: i mixed up gate and lopass (!)

[stevenclements]

[de_engineered]

Neat stuff, fonik

Any chance of a schematic or some sound clips of your modded Buchla there?

You just using a CD405X to manage the switching?

[fonik]

sound clips and a little vid will follow.

here is the link of the dedicated thread:
http://electro-music.com/forum/topic-36200.html

i will ask for interest for professional manufactured PCBs soon.

[patchdub]

hi. could someone please explain what is happening with the control input and the -cv. i can hear dope things happen when i put an eg or a lfo in the control but i am not clear as to what is going on.

the -cv i am not hearing anything going on but i may not have it wired correct. or perhaps it is like a - on an eg which i have no idea what to do with.

thank you!. thanks thomas for the fun!!
-patch

[djthomaswhite]

Hi there,

Control is just a CV input named simply "Control" instead of "Control Voltage" which is often shortened to CV.

The (-) output is an inverted image of the voltage running through the CV mixer section. More like a "bonus" than anything else. If you're not using this module and have two phase shifters of two VCA's you can run an LFO into one of either VCA or Phaser and the other VCA would be fed by the same LFO signal after being run into the LPG and out the (-) jack. Voila. Auto pan or stereo phase shift.

Hope this helps,

Thomas

[patchdub]

thanks for the reply!

i guess what i was wondering is why the control seems to sound or effect the sound differently than the cv1 or cv2? do control, cv1 and cv2 all do the same thing the difference being that cv1 and 2's amount can be adjusted?

auto pan and stereo phase shift option is way cool! gonna try that later tonight.

thanks again.

[djthomaswhite]

Control is a directly connected cv without any level shift due to going through a pot to ground attentuator. Try running pulse triggers j stead of gate into control to get the minimum time response out of your vactols. Thanks!

ThomAS

[jmejia]

so sorry if this has been threaded already - but could someone give me the rundown of the differences between the vactrols that work in this circuit? I know some are slower and some are faster... is the VTL53C classic buchla? And I think the 5C4 is Thomas's "slopass gate"... what other vactrols work or are ppl's favorites? I assume the 5C2 is faster still.. what about the others in that or other series?

anyone done any homerolled vactrols in this project?

[TekniK]

i did try with 9 ,8 ,6 4 and the 3 versions

3 give the best result others have or a slow 'attack' or a way too long 'decay' or a bad combination of both

i highly recomend to go for the '3' version,if u not want to throw away your money...(like i did)

[Funky40]

I tryed VTL5C2 ( single, dual has other specks )
For plucky sounds C3 is best.
C2 is good for hihats or such. It's a bit longer/slower
Not tested C1 but am very interested in C1, have some, must test.

[stevenclements]

[jmejia]

I'm planning/choosing some modules to go into a small and somewhat independent system - my 2 RLPG pcb's have already made the cut - I'm debating whether or not to include normal VCA's.

Not having played with a lo-pass gate yet (of any make) I'm wondering if anyone thinks leaving out standard VCA's would be a mistake. The way I understand things - the only thing I'll give up is the ability to create extremely snappy envelopes. (my envelopes will be coming from VCS's btw). Am I overlooking anything.. from the demos I've heard it seems that the LPG is still plenty fast enough to do percussion.

Do LPG's play well under the control of complex envelopes?

Thanks!

[riley smith]

You might want to do audio rate amplitude modulation. Don't know how accurate the Lowpass Gates would be for this.

- Riley

[jmejia]

The taste i got from the videos on Thomas' site definitely seemed to have some sweet audio rate modulation. Anyone with some experience with these guys care to confirm/reject?

[oldmanfury]

Finally finished my er... quad LPG? Or at least a pair of dual RLPG's. More details at http://buzzville.typepad.com/oldmanfury/2009/09/quad-resonant-lopass-gates.html

They sound absolutely amazing. Resonance and the depth switch are must haves!

Thanks much Thomas.

-gerald

[oldmanfury]

And now that I transfered it to flickr, here is a photo of the finished products:

[djthomaswhite]

Trying to guage interest in a potential 3rd batch of boards. Please reply with qty interested in if at all. Thanks!

No changes, just more boards for those who missed out on batch 1 or 2. Now that Fonik has his gate switching pcb, bridechamber has panels, and build reports are showing up all over there may be interest where there wasn't before.

Thomas

[thundarr]

I'd be interested in two PCBs. Cheers

[haricots]

I'm in for two (as stated on the AH list).

[lanxe]

I am in for 4 more for sure.

I just finished building two (one with the slower vactrols and one with the faster vactrols from smallbear)........These things are amazingly useful.

Somebody correct me, but with these I feel like any other VCA is a waste of space. The LPG can be an awesome VCA or filter!

Ryan

[cbm]

[nerdware]

Oh yes, two for me.

Thanks.

[numbertalk]

I notice this in filter mode as well - seems to be no way to completely silence the signal in the 2 I've built so far.

[jmejia]

I emailed you as well - but for solidarity I'll post here so you have it all in once place. I'm in for 2 for sure... maybe 4.