MU single width VCO Ideas

xart · Post by **xart** » Wed Dec 08, 2010 11:21 am

krisp14u wrote: If there is enough interest I will do it

Mark me down for all 3.
The OAKLEY/KRISP MU VCO's are wonderful!

ATOM · Post by **ATOM** » Wed Dec 08, 2010 11:55 am

Synthbuilder wrote: But I will be doing a single width VCO module as a PCB project and I hope it will be ready in February*.
I have two designs in mind, one is a basically a single width version of my double width VCO board,
the other is a more 'traditionally inspired' module.

ATOM

7thDanSound · Post by **7thDanSound** » Wed Dec 08, 2010 1:25 pm

I have this idea for a 1 space module that can be booth VCO and VC envelope (which I think is quite needed in MU land) but I don't know how to build these things, being no EE. I'll offer the design to anyone willing to do it just to see it done.

Other than that, yes please FM would be nice, and digital at all actually!

doctorvague · Post by **doctorvague** » Wed Dec 08, 2010 1:53 pm

7thDanSound wrote:VCO and VC envelope

OMG it's an Oscillope!

7thDanSound · Post by **7thDanSound** » Wed Dec 08, 2010 2:23 pm

Yeah, sans screen then

dslocum · Post by **dslocum** » Mon Dec 20, 2010 6:23 pm

7thDanSound

I have this idea for a 1 space module that can be booth VCO and VC envelope (which I think is quite needed in MU land) but I don't know how to build these things, being no EE. I'll offer the design to anyone willing to do it just to see it done.

Pleeze PM Me to discuss.

7thDanSound · Post by **7thDanSound** » Mon Dec 20, 2010 8:15 pm

Did pm, have fun!

Just me · Post by **Just me** » Mon Dec 20, 2010 10:58 pm

I could use a 1MU width Sine/triangle wave LFO/VCO with 1V/Oct tracking and Fine and course tune knobs to use with the ZO's as modulators.

dslocum · Post by **dslocum** » Tue Dec 21, 2010 8:20 am

bwhittington wrote:
dslocum wrote:Got a link?
http://www.analoguehaven.com/synthesistechnology/e350/

(part 1 of 4)

I don't know why I didn't check this out before today, but OMG! what a fantastic ocsillator. Why isn't it on the SynthTech site? Do they offer it in MU? Do they offer it in kit?

MUST HAVE in SteamSynth format!!!!

pugix · Post by **pugix** » Tue Dec 21, 2010 8:48 pm

Just me wrote:I could use a 1MU width Sine/triangle wave LFO/VCO with 1V/Oct tracking and Fine and course tune knobs to use with the ZO's as modulators.

That's one purpose of a 1U VCO I was looking for. The e350 MT solved it for me in MOTM size. But a basic triangle/sine core, maybe with sync, would fill the bill.

dslocum · Post by **dslocum** » Wed Dec 22, 2010 9:12 am

Here's a proposed layout for a new SSL 1MU VCO.

fac · Post by **fac** » Wed Dec 22, 2010 10:07 am

Beautiful. I'll take two.

Bryan B · Post by **Bryan B** » Wed Dec 22, 2010 12:04 pm

That is very nice, how much?

7thDanSound · Post by **7thDanSound** » Wed Dec 22, 2010 1:19 pm

Nice VCO dslocum! I'd lose the thru CV for a second output though but the alternative is a mult in any case so I guess there's no real difference...

dslocum · Post by **dslocum** » Wed Dec 22, 2010 1:59 pm

Bryan B wrote:That is very nice, how much?

Too early yet. More than Rogers Q106 and less than Rolls-Royce's A380 engine re-works.

I'm shooting for mid to late March delivery, BTW.

dslocum · Post by **dslocum** » Wed Dec 22, 2010 2:01 pm

7thDanSound wrote:Nice VCO dslocum! I'd lose the thru CV for a second output though but the alternative is a mult in any case so I guess there's no real difference...

Speak up, kind Sir. What would you change? The panel mockup is open to the floor for discussion.

Henfield · Post by **Henfield** » Wed Dec 22, 2010 2:32 pm

Great idea and great looking oscillator! As much as I like an octave switch, I can live with a Coarse and Fine knob. Depending on price, I may have to get one or two when they finally hit the market.

7thDanSound · Post by **7thDanSound** » Wed Dec 22, 2010 3:48 pm

Well, my point is that it's easy to mult the CV going into the thing (thus not needing the CV-thru) but having more than one output from the oscillator is always useful. The pulse plus a selectable waveform is really an advantage over something that is easily accomplished with a mult. IMO that is

dslocum · Post by **dslocum** » Wed Dec 22, 2010 4:03 pm

7thDanSound wrote:Well, my point is that it's easy to mult the CV going into the thing (thus not needing the CV-thru) but having more than one output from the oscillator is always useful. The pulse plus a selectable waveform is really an advantage over something that is easily accomplished with a mult. IMO that is

Pretty easy to do, if there's some consensus. Should the fourth output be sine? (BEWARE --- FEATURE CREEP = MORE MONEY)

7thDanSound · Post by **7thDanSound** » Wed Dec 22, 2010 4:35 pm

I might be in the dark here but in the mockup you present there is one output right? Which is a selectable wave form? This is perfectly fine by me. Then there is the 1V/oct input, great, that is needed. Then there is a 1V/oct through jack. Just put one of the waveforms on that one, the pulse might be preferable IMO but YMMV. No need for a sine output in a design like this one.

Still, this is in the humblest of opinions just to be clear.

Bryan B · Post by **Bryan B** » Wed Dec 22, 2010 4:44 pm

Is the CV through like a buffered out? So there would be no droop with chaining pitch inputs?

dslocum · Post by **dslocum** » Wed Dec 22, 2010 5:36 pm

Bryan B wrote:Is the CV through like a buffered out? So there would be no droop with chaining pitch inputs?

As initially planned, NO. The CV input to Thru output is just a simple wire. No buffering.

Suggestions?

dslocum · Post by **dslocum** » Wed Dec 22, 2010 6:17 pm

7thDanSound wrote:I might be in the dark here but in the mockup you present there is one output right?

Right.

7thDanSound wrote:Which is a selectable wave form? This is perfectly fine by me. Then there is the 1V/oct input, great, that is needed. Then there is a 1V/oct through jack. Just put one of the waveforms on that one, the pulse might be preferable IMO but YMMV. No need for a sine output in a design like this one.

Still, this is in the humblest of opinions just to be clear.

So instead of the "1V/Oct Thru" jack, you would prefer having a SEPARATE output for a variable pulse-width rectangle wave. Right?

What would the "WAVE switch" on my prototype do? Would it have another function, or another wave?

Always looking for new ideas.

Bryan B · Post by **Bryan B** » Thu Dec 23, 2010 12:06 am

If the Thru is a simple multiple of the CV in, I would say use it for something else. I do think it would be handy to have it buffered somehow so it would allow 18 oscillators to run off the same pitch CV without noticeable droop in the Pitch CV signal.

That would probably cost more to do it that way, so it could be left off.

You could have an inverted or phase shifted oscillator out instead of a multipled cv thru maybe.

7thDanSound · Post by **7thDanSound** » Thu Dec 23, 2010 3:20 am

I'm suggesting you keep the wave switch and the selectable wave output like you have in the prototype. Then just put a square wave or something on the separate output instead of the CV thru. Maybe it could be a suboctave square? Unless that takes up too much components and makes the module much more expensive.

Having a buffered CV thru might be nice however but it could be on the PCB instead. That way one could chain a couple of VCOs behind the panels. The 1V/oct jack on the panel could be breaking the connection.

MOD WIGGLER

MOD WIGGLER

MU single width VCO Ideas