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 Forum index » DIY Hardware and Software » YuSynth
New module at yusynth.net : Quadrature VC-LFO
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yusynth



Joined: Nov 24, 2005
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PostPosted: Sat Oct 03, 2009 3:07 pm    Post subject: New module at yusynth.net : Quadrature VC-LFO Reply with quote  Mark this post and the followings unread

Title says it all, check it at http://yusynth.net/Modular/index_en.html
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elektro80
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PostPosted: Sat Oct 03, 2009 3:14 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hey, that´s quite a useful little rascal you have there. Very Happy
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Sebo



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PostPosted: Sat Oct 03, 2009 6:05 pm    Post subject: Reply with quote  Mark this post and the followings unread

Wonderful Yves!!!
Another great module!!!
Thanks.

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diablojoy



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PostPosted: Mon Oct 05, 2009 4:29 am    Post subject: Reply with quote  Mark this post and the followings unread

another to add to the list Smile
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Thalassa



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PostPosted: Mon Oct 05, 2009 5:42 am    Post subject: Reply with quote  Mark this post and the followings unread

Just one question...

On the wiring diagram there are two level pots , is it the same pot but just doubled wired ?

The bad thing about this module it's that I'm starting to full my cabinet and I want to build a lot of modules more Very Happy

Great work Yves

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yusynth



Joined: Nov 24, 2005
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PostPosted: Mon Oct 05, 2009 6:00 am    Post subject: Reply with quote  Mark this post and the followings unread

Thalassa wrote:
Just one question...

On the wiring diagram there are two level pots , is it the same pot but just doubled wired ?

The bad thing about this module it's that I'm starting to full my cabinet and I want to build a lot of modules more Very Happy

Great work Yves


There is a dual gang potentiometer (OUTPUT LEVEL): two coaxial pots sharing the same shaft. Like this :
http://www.musikding.de/product_info.php/info/p1628_Alpha-Potentiometer-24mm-Stereo-100k-lin.html

You started with a small size cabinet and you will end with a huge one just like I did ! :
http://yusynth.net/gear/studio/index_en.html

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Thalassa



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PostPosted: Mon Oct 05, 2009 6:05 am    Post subject: Reply with quote  Mark this post and the followings unread

Thanks for your fast reply Smile , Will be on my "things to do" list . By the way i also saw the modular synth that is selling on Ebay ( you make a comment on the matrixsynth ). I was cehcking the wesite also and at least the front panels are copies of your designs I think that they should said something that is based on your designs.
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yusynth



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PostPosted: Mon Oct 05, 2009 6:13 am    Post subject: Reply with quote  Mark this post and the followings unread

From what I saw on their site the PCB have been slightly redesigned : same drawing but spread over a large PCB.

I agree they could have mentioned that it is based on the yusynth design.

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numbertalk



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PostPosted: Tue Oct 06, 2009 4:52 pm    Post subject: Reply with quote  Mark this post and the followings unread

Great news and a great looking module. Definitely going into my ever-growing queue.
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Pehr



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PostPosted: Thu Oct 08, 2009 12:55 pm    Post subject: Reply with quote  Mark this post and the followings unread

nice looking module Yves! Very Happy small and tidy, great work!
but we want sound samples too! Wink

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6079smith



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PostPosted: Fri Oct 09, 2009 12:21 am    Post subject: Reply with quote  Mark this post and the followings unread

Finished this last night, and it works just great. Thanks Yves!
A.
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yusynth



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PostPosted: Fri Oct 09, 2009 12:35 am    Post subject: Reply with quote  Mark this post and the followings unread

6079smith wrote:
Finished this last night, and it works just great. Thanks Yves!
A.

Yes it is quite an easy project to build, it works straight away !

Have fun with it.

Cheers

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synthmonger



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PostPosted: Tue Oct 13, 2009 5:14 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hi Yvves,

On your Quadrature LFO page you mention Shepard tone generation with 4 VCOs.

Is it as simple as sending the phase outputs to 4 VCOs that are octaves apart?

I believe you need two of the VCOs amplitude being controlled by a sawtooth oscillator that has 0 and 180 degree outputs. It would also need to run at twice the frequency. I assume you would need that kind of setup to make the transition between pitch smooth.

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yusynth



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PostPosted: Tue Oct 13, 2009 11:32 pm    Post subject: Reply with quote  Mark this post and the followings unread

synthmonger wrote:
Hi Yvves,

On your Quadrature LFO page you mention Shepard tone generation with 4 VCOs.

Is it as simple as sending the phase outputs to 4 VCOs that are octaves apart?

I believe you need two of the VCOs amplitude being controlled by a sawtooth oscillator that has 0 and 180 degree outputs. It would also need to run at twice the frequency. I assume you would need that kind of setup to make the transition between pitch smooth.


I gave a clue of a possible use of the Quad-VCLFO, then one has to dig things up by oneself.
With four sinewaves you have only one part of what is required for true shepard tone generation, but nevertheless one can already obtain some fun effects with the sinewaves only.

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synthmonger



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PostPosted: Wed Oct 14, 2009 7:09 am    Post subject: Reply with quote  Mark this post and the followings unread

yusynth wrote:


I gave a clue of a possible use of the Quad-VCLFO, then one has to dig things up by oneself.
With four sinewaves you have only one part of what is required for true shepard tone generation, but nevertheless one can already obtain some fun effects with the sinewaves only.


Ah! I wasn't sure if it was as easy as plugging them into 4 VCOs octaves apart. I did some googling then found out what you needed exactly and while it is simple you do need a lot more than what I originally thought.

Thanks for clarifying Yvves Wink

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numbertalk



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PostPosted: Wed Oct 14, 2009 7:33 am    Post subject: Reply with quote  Mark this post and the followings unread

Mind sharing a link(s) to what you found?

Thanks.

synthmonger wrote:
yusynth wrote:


I gave a clue of a possible use of the Quad-VCLFO, then one has to dig things up by oneself.
With four sinewaves you have only one part of what is required for true shepard tone generation, but nevertheless one can already obtain some fun effects with the sinewaves only.


Ah! I wasn't sure if it was as easy as plugging them into 4 VCOs octaves apart. I did some googling then found out what you needed exactly and while it is simple you do need a lot more than what I originally thought.

Thanks for clarifying Yvves Wink
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synthmonger



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PostPosted: Wed Oct 14, 2009 8:00 am    Post subject: Reply with quote  Mark this post and the followings unread

http://www.youtube.com/results?search_query=shepard+tone&search_type=&aq=f


I did some "simulations" in ableton like the guy did in his youtube demos. It's fun to mess around with and get a feel for it. Though I barely know the program and it probably could've taken me less time to build it on breadboard then figure out in Ableton.

The links on Yusynth's page about the Quadra VCLFO also work.

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Last edited by synthmonger on Wed Oct 14, 2009 10:43 am; edited 1 time in total
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numbertalk



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PostPosted: Wed Oct 14, 2009 8:29 am    Post subject: Reply with quote  Mark this post and the followings unread

Awesome, thanks!

synthmonger wrote:
http://www.youtube.com/results?search_query=shepard+tone&search_type=&aq=f


I did some "simulations" in ableton like the guy did in his video on Youtube. It's fun to mess around with and get a feel for it. Though I barely know the program and it probably could've taken me less time to build it on breadboard then figure out Ableton.

The links on Yusynth's page about the Quadra VCLFO also work.
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Sine



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PostPosted: Sat Oct 17, 2009 12:23 pm    Post subject: Reply with quote  Mark this post and the followings unread

It's tricky to do

I experimented a bit with my modular but the imprecision of the dual gang pots and the least bit of tracking errors in the VCO's ruins the effect.
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yusynth



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PostPosted: Tue Dec 08, 2009 12:37 pm    Post subject: Reply with quote  Mark this post and the followings unread

UPDATE

I have corrected the wiring diagram where the connections of the dual gang pot were mixed up. Now it is fine Wink

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klstay



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PostPosted: Wed Apr 28, 2010 9:30 am    Post subject: PCB source Reply with quote  Mark this post and the followings unread

Has anyone done a run of PCBs for this? (Any bridechamber plans for PCBs and panels?)
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yusynth



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PostPosted: Wed Apr 28, 2010 11:40 pm    Post subject: Re: PCB source Reply with quote  Mark this post and the followings unread

klstay wrote:
Has anyone done a run of PCBs for this? (Any bridechamber plans for PCBs and panels?)


Scott Deyo did not express interest for this module, I will ask him if he is interested.

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littlem4tt



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PostPosted: Fri Sep 06, 2013 4:19 am    Post subject: Reply with quote  Mark this post and the followings unread

Can you confirm if there a 3 or 4 wire links in the design?. There are 4 in the diagram but the text says 3
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littlem4tt



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PostPosted: Fri Sep 06, 2013 6:23 am    Post subject: Reply with quote  Mark this post and the followings unread

I have connected all 4 and all is good.
I have adapted the original design for eurorack 12v. (no modifications!)
Because the board is so long i used photoshop to cut the design in half and placed each half next to each other. And then re connected the breaks.
I also added solder pads for the pots so i could mount the board easily.
Thank you so much Yves for sharing. This is my second yusynth module and i have already made a clock divider pcb. Very Happy

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yusynth



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PostPosted: Fri Sep 06, 2013 7:07 am    Post subject: Reply with quote  Mark this post and the followings unread

Nice eurorack adaptation Cool
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