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

djthomaswhite · Joined: Nov 22, 2007 Posts: 140 Location: Orange, CA

Scott at Bridechamber has given me the inital green light that the two panel designs I presented above will be converted to Bridechamber style and hopefully included on the next batch of panels. No pricing yet but will be way cheaper and better quality than the FPE panels!

Thank goodness for Scott and his willingness to support our needs in the sit community

Thomas

numbertalk · Posted: Wed Oct 08, 2008 11:38 am Post subject:

Thanks very much for this information - good to know.

cbm · Joined: Oct 25, 2005 Posts: 381 Location: San Francisco

djthomaswhite · Joined: Nov 22, 2007 Posts: 140 Location: Orange, CA

Summed output...

That could be done with the on board mixer sections provided one does not use the mixers to sum multiple audio/cv signals on every modules. For example, if you are using 4 PCB's to make a quad unit, using direct ins like the original 292 did would leave 8 3 input mixers available for patching however you could dream up. 4 of those would have an inverting output. You could easily use two sections mixed by a third to get the sum, or even use one section and kludge on an extra resistor to get 4 inputs from one section. This is the benefit to the pads and jumpers on the PCB's as designed. Time to get creative and to each have the freedom to "do our own thing."

MOTM Panels...

Just to clear up my previous post, Bridechamber will be making both panels. I recommend you to build a single for sure, but to also build a double. The Youtubes I made would not be possible without a single 1U LPG and 2 external mixers. I am all for keeping things "modular 100%" but with so many patch cords already it is sometimes nice to just have what you need right on what you need instead of a patch cord distance away. I think that those who build one and play with it a while will want to build another with the mixer sections on the panel. It just makes it easier to work with when trying to get sounds quick, and your knobs to tweak are all next to each other. I am sure the 1U will be more popular, but the 2U will also get some glory too.

Thanks guys!

Thomas

synthetic · Joined: Jun 02, 2007 Posts: 76 Location: Glendale, CA

I can't decide, but I'll probably do the 1u panels since I'm building two of them.

wmonk · Posted: Wed Oct 08, 2008 3:56 pm Post subject:

For me, the 2U panel is ok. Get the most out of the design, and get a mixer for free. Very Happy

/mr · Posted: Thu Oct 09, 2008 2:26 am Post subject:

fonik · Posted: Thu Oct 09, 2008 2:34 am Post subject:

/mr · Posted: Thu Oct 09, 2008 3:50 am Post subject:

fonik · Posted: Thu Oct 09, 2008 5:34 am Post subject:

you are right. i am doing it on some of my modules, too.
what i was thinking of was: what is one module? should i have the mixer as a stand alone module or as a part of one module with prepatched connections? should i plan a whole system upfronnt, with one panel and the possibility to prepatch almost everything?
but okay, this is a whole other story/topic, and in vito i always come up with a finished module with more or less functions and prepatched connections in an intuitive way Very Happy

/mr · Posted: Thu Oct 09, 2008 6:17 am Post subject:

numbertalk · Posted: Thu Oct 09, 2008 7:18 am Post subject:

Just reading through the documentation and I had actually been wondering about the inverted CV output. I was hoping someone might not mind elaborating a bit on that and could suggest a specific patch (especially also involving the non-inverted CV signal) as a starting point to realize some of the possibilities of having this output available.

BananaPlug · Posted: Thu Oct 09, 2008 7:56 am Post subject:

Sketch of dual layout for Frac Rack.

The Offset and Resonance pots are spaced in agreement with the PCB. I'll pursue this further once I have an actual board here. I think the way the PCB's laid out, the board would be above those two pots and my deep switch needs to creep upwards a bit to clear it. Should be possible.

If DC coupling the input works well I'll use a pull switch pot to add that feature. Not sure how carried away to get with the Link switch. Might be a DPDT switching Ch1 out to one of Ch2's Audio summing inputs and Ch1 CV sum stage out to one of Ch2's CV summing inputs.

lpgFracRoughA.jpg

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neandrewthal · Joined: May 11, 2007 Posts: 672 Location: Canada

I'm going to pay homage to the orginal buchla version with a quad unit. I can fit all 4 of them in the same space as one "deluxe" version. If I really need to mix multiple signals I can use an external mixer, or just drive several units in parallel and take the summed output. I think I will link all the CV inputs with switching jacks, and also use them to subtract the individuals outputs from the summed out as /mr suggested. Much more flexible and space effective IMO.

e-grad · Joined: Sep 12, 2008 Posts: 142 Location: Berlin

BananaPlug · Posted: Thu Oct 09, 2008 10:01 am Post subject:

/mr · Posted: Thu Oct 09, 2008 12:06 pm Post subject:

urbanscallywag · Joined: Nov 30, 2007 Posts: 317 Location: sometimes

Is it possible to use an LPG on CV in a Buchla?

/mr · Posted: Thu Oct 09, 2008 12:46 pm Post subject:

urbanscallywag · Joined: Nov 30, 2007 Posts: 317 Location: sometimes

Interesting, thanks. Smile

BananaPlug · Posted: Thu Oct 09, 2008 2:35 pm Post subject:

/mr · Posted: Thu Oct 09, 2008 3:06 pm Post subject:

...or the later 292C, with remote capabilities for the Buchla 300 system:
Posted Image, might have been reduced in size. Click Image to view fullscreen.

Phillip Jeffries · Joined: Aug 23, 2008 Posts: 15 Location: Black Lodge

urbanscallywag · Joined: Nov 30, 2007 Posts: 317 Location: sometimes

Nice.