ASR patching examples, demos, etc

Anything modular synth related that is not format specific.

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Jason Brock
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Post by Jason Brock » Fri Aug 05, 2011 3:04 pm

Mitchk1989 wrote:Any of these easily build able in euro? Right now we have no ASR.
The Toppobrillo Quantanimator can function as an ASR. Digitally. So I guess it is technically a DSR.

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rezzn8r
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Post by rezzn8r » Fri Aug 05, 2011 4:00 pm

Jason Brock wrote:
Mitchk1989 wrote:Any of these easily build able in euro? Right now we have no ASR.
The Toppobrillo Quantanimator can function as an ASR. Digitally. So I guess it is technically a DSR.
Yeah, my buddy has one of these. I like it. The Chord function is pretty cool, too.
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sunsinger
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Post by sunsinger » Fri Aug 05, 2011 5:49 pm

I posted this demo of the STG version of the Ken Stone ASR on Soundcloud sometime back.
http://soundcloud.com/sunsinger/asr-demo-3

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cerebrosis
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Post by cerebrosis » Fri Aug 05, 2011 6:15 pm

Hmm. My Metalbox doesnt track anywhere near that good :cry:

It never bothered me until this thread. What could i do to get it to track like that?

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sunsinger
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Post by sunsinger » Fri Aug 05, 2011 7:11 pm

Well, there is that Q171 Quantizer on the outputs of the ASR. So a quantizer makes the pitch pretty sweet.

I've heard that most ASR's need a Quantizer to get perfect pitch, even the Serge, which has twin ASRs, has matching quantizers on the ASR module.

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Dr. Sketch-n-Etch
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Post by Dr. Sketch-n-Etch » Fri Aug 05, 2011 10:15 pm

My updated version of the CGS ASR does not require a quantizer. It may be my version heard in Sunsinger's demo, as STG was building it, but I know he also sent out some based on the original CGS circuit.

In any case, one shouldn't necessarily always blame the ASR. There are two sources of error. One is the voltage being sampled. Some voltage sources may put little tiny voltage spikes on the CV when switching, and these may be captured by the ASR. If this is the case, then the CV source needs a bit of filtering. The other source of error is the ASR itself, and here there are two possibilities: S&H drift and imperfect copying of the voltages. These depend on a lot of things. The first sort of error is easily avoided by using low-leakage caps, low-input-bias-current buffers, and guard traces around the high-impedance traces in the S&H circuits, all of which was done in the original CGS circuit. However, I believe that that circuit is very susceptible to the second kind of error, because of the way the voltages are level-shifted twice. This means that tracking precision depends almost entirely on how well-matched the resistors on the input and output buffers are. This does not occur in my version, in which all the buffers are simple voltage followers with no level shifting.
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Post by sduck » Fri Aug 05, 2011 10:20 pm

I can probably throw together a few of the good doctors asr in motm format (sorry, not really set up to do other formats) - similar to the one in my video - for folks if there's any interest. And the Doctor doesn't mind selling me a few more pcbs. I already sold one to SepticUnderground. I'm not fast, and have another project up first, so it's priced accordingly - 150$ per (and X$ shipping), which means I'm not actually making any money (well, not much anyway) making these. PM me if interested.
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Post by diophantine » Fri Aug 05, 2011 10:53 pm

sduck wrote:I can probably throw together a few of the good doctors asr in motm format (sorry, not really set up to do other formats) - similar to the one in my video - for folks if there's any interest.
I'd very likely start a MOTM cabinet if I could go entirely with your panel designs!!

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Post by sunsinger » Sat Aug 06, 2011 12:19 am

If Dr. Sketch & Etch is you Ken. I'd love to get one of your ASR's. Please tell me how.

The demo I posted was indeed a prototype from STG, and even it, did track pretty well. I just put the quantizer on it for closer to perfect pitch.

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Post by Dr. Sketch-n-Etch » Sat Aug 06, 2011 12:24 am

sunsinger wrote:If Dr. Sketch & Etch is you Ken. I'd love to get one of your ASR's. Please tell me how.

The demo I posted was indeed a prototype from STG, and even it, did track pretty well. I just put the quantizer on it for closer to perfect pitch.
Sorry, I'm not Ken Stone. I'm Dave Dixon. However, my ASR design is an update of Ken's, done with his blessing.

I'm just putting the finishing touches on a stuffed board for "dude". I can do one for you too, if you want.

Bare PCB: $20. Stuffed PCB: $70. Shipping: $10 (US/Canada), $15 (anywhere else)
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Post by Dr. Sketch-n-Etch » Sat Aug 06, 2011 12:25 am

Actually, shipping to the dark side of the moon is going to be a tad more expensive! :lol:
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Post by sunsinger » Sat Aug 06, 2011 12:33 am

@ Dr. Sketch-n- Etch,

I couldn't DYI a panel on any level even if I have video instruction. I'd need an actual module for plug-n-play.

I do receive periodic shipments to the dark side of the moon courtesy of Dr. Gerard K. O'neil's supercooled mass driver. I can PM you his address to ship one to, so he can fire it off to me during an open window for my trajectory. 8_)

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Post by Dr. Sketch-n-Etch » Sat Aug 06, 2011 3:03 am

Well, my panels are pretty plain compared to sduck's. They're bare aluminum with plain black laserjet lettering (laid out with Front Panel Designer) printed backwards on Lazertran which is baked on for a durable plastic coating. I'll take a picture tomorrow and post it. The ASR panel is 5U x 1U (U = 1.75").

For a whole module, I'd charge probably $120 + shipping. That's $20 for the PCB, $50 to stuff the PCB, and $50 for the panel, hardware and wiring.

Alternatively, you could order your own panel from FPE and send it to me, or perhaps sduck could get you one of his fancy panels. Then I'd probably knock $20 off the price.
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cerebrosis
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Post by cerebrosis » Sat Aug 06, 2011 10:13 am

Dr. Sketch-n-Etch

Is it possible to have my CGS34 modified to your specs or instructions to do it?

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Post by sduck » Sat Aug 06, 2011 11:57 am

No need to get my "fancy" panel from me - here's the fpd for it - order your own! You can even change whatever you want - get rid of all those garish colors or whatever.

The one thing I would add after having used this for a while is yet another switch - one to lock out the input knob. There's plenty of room, and this would be easy peasy to do. Once too often while using the ASR I've managed to jostle the knob, which throws off the otherwise fantastic pitch properties of this device.
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1U Dixon ASR fixed.fpd
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Post by Dr. Sketch-n-Etch » Sat Aug 06, 2011 12:11 pm

cerebrosis wrote:Dr. Sketch-n-Etch

Is it possible to have my CGS34 modified to your specs or instructions to do it?
Probably not, unless (by some miracle) the DG409 has the same pinouts as the CD4052. I'll have to look into that and get back to you.

In any case, you can always swap out that board for one or mine. They're about the same size, and both have just 5 (or 6) connections.
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Post by dude » Sat Aug 06, 2011 12:20 pm

by the way, what are the measurements for the board? i am about to see about my bsdiy bracket nonsense. i should probably wait but i am too excited and feel like i need to drill holes on things!

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Post by JohnLRice » Sat Aug 06, 2011 12:48 pm

Is STG still going to produce an ASR? :hmm: Or was that module shelved?

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Post by Dr. Sketch-n-Etch » Sat Aug 06, 2011 1:35 pm

dude wrote:by the way, what are the measurements for the board? i am about to see about my bsdiy bracket nonsense. i should probably wait but i am too excited and feel like i need to drill holes on things!
The board is nominally 2.1" x 4.5", and the mounting holes are set 0.15" from the corners. Hence, the holes are centred on the corners of a rectangle which is 1.8" x 4.2". They're 1/8" diameter.
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Post by dude » Sat Aug 06, 2011 1:49 pm

thank you sir! preping for drilling. :sb:

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Post by dude » Sat Aug 06, 2011 8:35 pm

i am so stoked to patch this with the touch sequencer! here is a pic of my build sans panel behind it:
Image

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Post by Dr. Sketch-n-Etch » Sat Aug 06, 2011 9:58 pm

cerebrosis wrote:Dr. Sketch-n-Etch

Is it possible to have my CGS34 modified to your specs or instructions to do it?
Short answer, no. The CGS34 will only work with CD4052, which is the cause of all the problems with that design.
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Post by Dr. Sketch-n-Etch » Sat Aug 06, 2011 10:00 pm

JohnLRice wrote:Is STG still going to produce an ASR? :hmm: Or was that module shelved?
He was going to work my design into a module, I thought, but it seems to take him a very long time to get designs off the drawing board and into production.
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Post by JohnLRice » Sat Aug 06, 2011 10:12 pm

Dr. Sketch-n-Etch wrote:
JohnLRice wrote:Is STG still going to produce an ASR? :hmm: Or was that module shelved?
He was going to work my design into a module, I thought, but it seems to take him a very long time to get designs off the drawing board and into production.
Thanks! Maybe I'll start a post over in the STG forum. :tu:

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Post by Dr. Sketch-n-Etch » Sun Aug 07, 2011 12:26 pm

Just to clear up any mystery about it, if you want an ASR board from me, please just ask. The price is $20 Canadian.

In fact, any of my boards are available at any time. Have a look here for a list with prices:

viewtopic.php?t=21058
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