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 Forum index » DIY Hardware and Software » Jürgen Haible designs
Living VCOs
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Would you prefer one PCB with 3 VCOs a la JH-5A, or 1 VCO per PCB with more features
One PCB with Oscillator Driver and 3 VCO cores (like JH-5A - cheap!)
60%
 60%  [ 62 ]
1 PCB = 1 VCO (with many waveforms and inputs)
39%
 39%  [ 40 ]
Total Votes : 102

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fluxmonkey



Joined: Jun 24, 2005
Posts: 696
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PostPosted: Sat Dec 13, 2008 10:49 am    Post subject: Reply with quote  Mark this post and the followings unread

frijitz wrote:
mono-poly wrote:
I'd love to see a Buchla 158 or 144 like vco.
Simple vco with 1 waveform output.
But great fm and/or am sound.

I proposed doing this several months ago, but there wasn't much interest:
http://electro-music.com/forum/topic-28713.html
I guess if it doesn't say M... or B..... it's gonna get killed by the fanatics.

Very Happy

Ian


ian, i expressed interest at the time, and it remains... i wouldn't have seen this as an either/or situation, and would certainly pick up both if they come to fruition.

if you're queueing up projects, tho, i'm really looking forward to the DoubleDeka, ahead of anything else you've proposed... that is gonna be tasty!

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frijitz



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PostPosted: Sat Dec 13, 2008 3:02 pm    Post subject: Reply with quote  Mark this post and the followings unread

bbob wrote:

ian, i expressed interest at the time, and it remains...

I think we should move any more discussion of this over to its own thread.

Thanks.

Ian
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xpmtl



Joined: Aug 10, 2007
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PostPosted: Sat Dec 13, 2008 4:19 pm    Post subject: Reply with quote  Mark this post and the followings unread

Funky40 wrote:
johans121 wrote:
As long as I have money to blow, you'll continue to receive it Wink

Laughing
i'm in the same boat


one more on the boat here

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ach_gott



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PostPosted: Mon Dec 15, 2008 12:50 pm    Post subject: Reply with quote  Mark this post and the followings unread

xpmtl wrote:
Funky40 wrote:
johans121 wrote:
As long as I have money to blow, you'll continue to receive it Wink

Laughing
i'm in the same boat


one more on the boat here


Is there room for me on the boat? Smile
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johans121



Joined: Jun 19, 2007
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PostPosted: Tue Dec 16, 2008 1:37 pm    Post subject: Reply with quote  Mark this post and the followings unread

ach_gott wrote:
Is there room for me on the boat? Smile


the more the merrier Smile

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alain6870



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PostPosted: Tue Dec 16, 2008 2:04 pm    Post subject:  
Subject description: Explaining the detune capacity in a few simple words
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Hello Jürgen,

I think your design with 3 VCO on the same PCB is interesting for me. I would like to use it to create string pads or brass leads and for that purpose saw and square waves are ok. And if your design is based on a saw oscillator it would be easy to add as many waveshaper we want on extra pcbs. What really matters is the detune automation... If I don't misunderstood what you described, I could dare to summeries it this way: Embarassed

- linear detune (V/Hz) scale not influenced by the expo input (V/oct):

- 1 Hz detune between 2 oscillators (for instance 440 Hz and 881 Hz) stays 1Hz if I play an A5 (we have then respectively 880 Hz and 1761 Hz on both VCOs)

Best Regards

Alain

PS: Of course I would try one if your selling PCBs
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jhaible



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PostPosted: Tue Dec 16, 2008 2:12 pm    Post subject:
Subject description: Explaining the detune capacity in a few simple words
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alain6870 wrote:

- 1 Hz detune between 2 oscillators (for instance 440 Hz and 881 Hz) stays 1Hz if I play an A5 (we have then respectively 880 Hz and 1761 Hz on both VCOs)


That will be one of its features indeed.

JH.

Now playing: Brian Eno, Music for Films

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igormpc



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PostPosted: Sat Jan 03, 2009 5:15 pm    Post subject: Reply with quote  Mark this post and the followings unread

i am interested in one pcb also.
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plord



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PostPosted: Tue Jan 06, 2009 2:39 pm    Post subject: Reply with quote  Mark this post and the followings unread

I am interested in at least one Smile
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Electronicant



Joined: Feb 23, 2006
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PostPosted: Tue Jan 20, 2009 7:35 pm    Post subject: Reply with quote  Mark this post and the followings unread

The result of the poll point at the cheaper 3 VCO model with less waveforms. A suggestion for wave selection could be the stepless variable saw/pulse waveshaper used on MOTM-310 and Micromoog/Multimoog. Maybe that´s more complicated than the toggle on the JH5, but it´s the solution Moog choosed for their budget Micromoog. It´s a nice function and I assume that it could make the living VCO even more living Wink
Last edited by Electronicant on Tue Jan 27, 2009 10:30 pm; edited 1 time in total
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Krelnarb



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PostPosted: Wed Jan 21, 2009 1:33 pm    Post subject: Reply with quote  Mark this post and the followings unread

I'm also interested in at least one.

thanks!
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synthetic



Joined: Jun 02, 2007
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PostPosted: Fri Feb 13, 2009 4:56 pm    Post subject: Reply with quote  Mark this post and the followings unread

Looking forward to two or three oscillators like this.
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jhaible



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PostPosted: Fri Feb 13, 2009 5:48 pm    Post subject: Reply with quote  Mark this post and the followings unread

synthetic wrote:
Looking forward to two or three oscillators like this.


It's going to happen.
I've been working some hours on this today.
It will be 3 VCOs on one PCB.
I start with the core parts, and then see what else will fit on the board.

JH.

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"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f)
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303monkey



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PostPosted: Sun Feb 22, 2009 7:44 am    Post subject: Reply with quote  Mark this post and the followings unread

I would be up for 1, if not 2
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2thick4uni



Joined: Feb 20, 2009
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PostPosted: Sun Feb 22, 2009 12:28 pm    Post subject: Reply with quote  Mark this post and the followings unread

Count me in for a pcb
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aerogramma



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PostPosted: Mon Feb 23, 2009 10:53 am    Post subject: Reply with quote  Mark this post and the followings unread

TekniK wrote:
2 vco's on one pcb is ideal Juergen,but would be perfect if u just could add sine for both 2 on the pcb


I also vote for SINE out ... there're relatively few modules outtputting sinewaves Wink

thanks!

aero
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synthetic



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PostPosted: Mon Feb 23, 2009 1:23 pm    Post subject: Reply with quote  Mark this post and the followings unread

Sweet!!! I've been waiting for this for a while.
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jhaible



Joined: May 25, 2007
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PostPosted: Mon Feb 23, 2009 2:00 pm    Post subject: Reply with quote  Mark this post and the followings unread

aerogramma wrote:
TekniK wrote:
2 vco's on one pcb is ideal Juergen,but would be perfect if u just could add sine for both 2 on the pcb


I also vote for SINE out ... there're relatively few modules outtputting sinewaves Wink

thanks!

aero


No sine waves - sorry.
There is only so much I can put on a single PCB, and I decided to put 3 VCO cores there, plus a discrete PWM circuit per VCO, just like the JH-5 has.

JH.

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"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f)
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TekniK



Joined: Aug 10, 2008
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PostPosted: Mon Feb 23, 2009 10:18 pm    Post subject: Reply with quote  Mark this post and the followings unread

aerogramma wrote:
TekniK wrote:
2 vco's on one pcb is ideal Juergen,but would be perfect if u just could add sine for both 2 on the pcb


I also vote for SINE out ... there're relatively few modules outtputting sinewaves Wink

thanks!

aero


I don't care abouth sines,but i need them for my wave multipliers
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jhaible



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PostPosted: Sat Feb 28, 2009 3:49 am    Post subject: Reply with quote  Mark this post and the followings unread

Here's a little preview of what I'm working on.
Looks like I can indeed put 3 VCOs plus an Oscillator Driver on a single board! This may get very close to the whole oscillator section of my JH-5, just on a single 160mm * 100mm PCB.

JH.


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"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f)
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TekniK



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PostPosted: Sat Feb 28, 2009 4:53 am    Post subject: Reply with quote  Mark this post and the followings unread

jhaible wrote:
Here's a little preview of what I'm working on.
JH.


thumright
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mono-poly



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PostPosted: Sat Feb 28, 2009 5:09 am    Post subject: Reply with quote  Mark this post and the followings unread

Hmmm somehow i am getting interested Very Happy
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jhaible



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PostPosted: Sat Feb 28, 2009 5:43 am    Post subject: Reply with quote  Mark this post and the followings unread

Just finished PWM section of one channel.
PWM will be all discrete - no opamps in here!

Also, PWM works like in the CS-80: You can heavily overmodulate it without loosing the signal!

JH.

_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f)
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dingebre



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PostPosted: Sun Mar 01, 2009 1:29 am    Post subject: Reply with quote  Mark this post and the followings unread

Well, you don't waste time do you Smile Congratulations on the progress.

I will purchase two PCB sets at least regardless, but was wondering what tracking accuracy you were shooting for?

For outputs, there will be a PWM amd sawtooth as in the JH-5, right?

Thanks for your efforts and for sharing your skill and talent.

David

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jhaible



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PostPosted: Sun Mar 01, 2009 2:31 am    Post subject: Reply with quote  Mark this post and the followings unread

dingebre wrote:
Well, you don't waste time do you Smile Congratulations on the progress.

I will purchase two PCB sets at least regardless, but was wondering what tracking accuracy you were shooting for?

For outputs, there will be a PWM amd sawtooth as in the JH-5, right?

Thanks for your efforts and for sharing your skill and talent.

David


Tracking: decent. Good enough for a mono synth. No efforts to get ultimate precision.

PWM and saw, yes.

JH.

_________________
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