DIY JPTR 8 clone *** New VCO Core Picture ***

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hox3d
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Post by hox3d » Wed Dec 05, 2018 4:29 am

Woaw.

It's densely populated.

Looking forward to see where this goes!
Matte-fueled habits

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Eric the Red
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Post by Eric the Red » Wed Dec 05, 2018 12:52 pm

I am so looking forward to building this!

-Eric
Abandon all hope, ye who wiggle.

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muffdiver
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Post by muffdiver » Thu Dec 06, 2018 4:16 am

Just in time for Jupiter’s transit through Sag...

Color me interested!

SMD (0805) preferred but TH is fine.
---,---,---,---,---,---,---,---,---,---,---,---,---,---,---,---,

---`---`---`---`---`---`---`---`---`---`---`---`---`---`

DisappearHere
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Post by DisappearHere » Thu Dec 06, 2018 9:46 am

I'd potentially be interested in an SMD version. Looks great so far.

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Chrutil
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Post by Chrutil » Thu Dec 06, 2018 10:21 am

Great soldering job and beautiful board.
I would personally much rather diy this one rather than TH, but beggars can't be choosers.
Curious how the voice card connects to the host/motherboard?
Are there smd headers underneath perhaps?

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sduck
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Post by sduck » Thu Dec 06, 2018 11:00 am

So I missed a page or 3 - are there 8 of those voice cards? Or just one?

I would be interested, through hole or smt, slight preference for through hole.
flickr cloud of sound touyube NOT A MODERATOR ANYMORE

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Boogie
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Post by Boogie » Fri Dec 07, 2018 7:09 am

Thank you all for your wonderfull feedback :chug:

muffdiver
SMD (0805) preferred but TH is fine.
Current design is 0603, so I guess the chance for a 0805 is as good as none...
Nevertheless, TH will be created !

Chrutil
Great soldering job and beautiful board.
Thanks !
Curious how the voice card connects to the host/motherboard?
Are there smd headers underneath perhaps?
Yes. Picture from very first post:
Image

sduck
are there 8 of those voice cards? Or just one?
For now there are 8.
But for the stand-alone, I'm considdering to go to two layers of PCBs.
The top one being the control panel and the next layer the voice boards, amplifier, processors, etc... I haven't taken a decision yet.

Updated the preference list.
Anyone who would like to see a Through Hole od SMD version of this voice board ?
You can still add your name to the list.

TH
1. Fitchie
2. aabbcc
3. tobb
4. JanneI
5. Jaytee
6. djs
7. Eric the Red
8. Level5
9. gianni
10. Fredp
11. Arnoid
12. boops
13. Chrutil
14. devinw1
15. CliffordMilk
16. peloazul TH or SMD
17. magman
18. makhho
19. KlangGenerator
20. 4floorsofwhores
21. Nidas
22. D33K
23. muffdiver
24. Chrutil
25. sduck

SMD
1. Revok
2. grenert
3. Starspawn
4. mOBiTh
5. mangros
6. Chrutil
7. peloazul
8. amir
9. Portabella
10. YannickD
11. muffdiver
12. DisappearHere
Last edited by Boogie on Fri Dec 07, 2018 7:30 am, edited 1 time in total.
-------------------------------------------------------
“Digital generated ‘analog’, is missing its analog soul and therefore isn’t analog any more.”
Jupiter 8 clone: https://www.muffwiggler.com/forum/viewt ... p?t=209322
Minipops 7 clone: https://www.muffwiggler.com/forum/viewt ... p?t=199360
ClapTrap clone: https://www.muffwiggler.com/forum/viewt ... p?t=202248
www.nabla-instruments.com

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revtor
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Post by revtor » Fri Dec 07, 2018 7:22 am

I’m really wondering if the through hole do it yourself board would end up any cheaper than the pre-soldered surface mount? I kind of doubt it... plus 3x the size. Plus days of work. I don’t see any advantage?

groove
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Post by groove » Fri Dec 07, 2018 12:36 pm

I'd be happy with either SMD or TH ... if I had to choose, I guess I'd go with SMD.

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devinw1
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Post by devinw1 » Fri Dec 07, 2018 12:57 pm

Hot damn, that's a dense and lovely board!

BTW, I prefer thru hole because it's easier to handle the parts and see what's going on...haha. And I really like DIP chips in sockets. Nice and meaty.

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ST.P
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Post by ST.P » Fri Dec 07, 2018 7:10 pm

Yes, i am in for a TH - Version :guinness:

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Chrutil
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Post by Chrutil » Fri Dec 07, 2018 11:54 pm

Boogie wrote: Chrutil
Curious how the voice card connects to the host/motherboard?
Are there smd headers underneath perhaps?
Yes. Picture from very first post:
Image
Ah goodie. Just one comment then, on the rendering it would be tricky to get to the calibration trimmers when all boards are populated.
I would suggest using something like this:
Image
instead of this:
Image

Looks great so far!

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duff
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Post by duff » Sat Dec 08, 2018 1:29 am

I’d probably be interested in a DIY voice board option, but as others have said I’d rather this was SMD (preferably 805 over 603) than TH.

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Boogie
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Post by Boogie » Sat Dec 08, 2018 3:47 am

Chrutil
I would suggest using something like this:
Image
instead of this:
Image
You're showing twice the same, the op one is just put on its side.
But I think I know what you mean, good idea btw.
Something like this:
Image

hox3dWoaw. It's densely populated.
devinw1Hot damn, that's a dense and lovely board!
Top side 341 components on 40.6 cm2
Bottom side 10 more components incl 3 connectors

revtor
I’m really wondering if the through hole do it yourself board would end up any cheaper than the pre-soldered surface mount.
I agree with this on component base. Though due to the fixed costs on machine programming, batch cost, setup cost,...the SMD boards probably end up more expensive. But then only when one doesn't have to pay for his own hours in assembbling the thing.

duff
preferably 805 over 603
I have to dissapoint you guys here.
Version 1) SMD ==> 0603
Version 2) TH

Updated the preference list.
Anyone who would like to see a Through Hole od SMD version of this voice board ?
You can still add your name to the list.

TH
1. Fitchie
2. aabbcc
3. tobb
4. JanneI
5. Jaytee
6. djs
7. Eric the Red
8. Level5
9. gianni
10. Fredp
11. Arnoid
12. boops
13. Chrutil
14. devinw1
15. CliffordMilk
16. peloazul TH or SMD
17. magman
18. makhho
19. KlangGenerator
20. 4floorsofwhores
21. Nidas
22. D33K
23. muffdiver
24. Chrutil
25. sduck
26. devinw1
27. ST.P

SMD
1. Revok
2. grenert
3. Starspawn
4. mOBiTh
5. mangros
6. Chrutil
7. peloazul
8. amir
9. Portabella
10. YannickD
11. muffdiver
12. DisappearHere
13. groove
14. duff
-------------------------------------------------------
“Digital generated ‘analog’, is missing its analog soul and therefore isn’t analog any more.”
Jupiter 8 clone: https://www.muffwiggler.com/forum/viewt ... p?t=209322
Minipops 7 clone: https://www.muffwiggler.com/forum/viewt ... p?t=199360
ClapTrap clone: https://www.muffwiggler.com/forum/viewt ... p?t=202248
www.nabla-instruments.com

NekoNeko
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Post by NekoNeko » Sat Dec 08, 2018 5:28 am

Wow this looks great.

Please count me in for through hole version. :tu:

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Boogie
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Post by Boogie » Sat Dec 08, 2018 7:08 am

Here are some first sounds.
The file contains both samples from the original Jupiter 8 and from the clone.
Edited: With thanks to guy who provided the Jupiter 8 samples. :chug:
These are single oscillator compares.
Something has gone wrong with the upload to SoundCloud.
Somehow lot's of noise have been introduced in the whole file. I'll update the file later today. Edited: better sounds in post below
http://soundcloud.com/boo-gie-879149310 ... sclonec1c4

And here are some detailled wave compares

Image
Image
Last edited by Boogie on Sat Dec 08, 2018 9:55 am, edited 2 times in total.
-------------------------------------------------------
“Digital generated ‘analog’, is missing its analog soul and therefore isn’t analog any more.”
Jupiter 8 clone: https://www.muffwiggler.com/forum/viewt ... p?t=209322
Minipops 7 clone: https://www.muffwiggler.com/forum/viewt ... p?t=199360
ClapTrap clone: https://www.muffwiggler.com/forum/viewt ... p?t=202248
www.nabla-instruments.com

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Jaytee
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Post by Jaytee » Sat Dec 08, 2018 7:41 am

revtor wrote:I’m really wondering if the through hole do it yourself board would end up any cheaper than the pre-soldered surface mount? I kind of doubt it... plus 3x the size. Plus days of work. I don’t see any advantage?
Some of us *like* the days of work. Nothing against those folks who want the prepopulated SMT boards, but I’m here because I want to...do it myself. ;)

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tobb
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Post by tobb » Sat Dec 08, 2018 7:43 am

looks/sounds good! :tu:

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Boogie
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Post by Boogie » Sat Dec 08, 2018 9:07 am

Here's some more audio.
No post processing, just pure voice board.
All sounds two oscillators, non synced.
First some notes with VCO1 and VCO2 at same note.
Then VCO2 detuning 1 quint up.
Some sequences, playing with the filter.
VCO2 tuning back to no transpose.
Paraphonic playing two different notes through one voice board.
Thus 1 VCO per note.
http://soundcloud.com/boo-gie-879149310 ... paraphonic
-------------------------------------------------------
“Digital generated ‘analog’, is missing its analog soul and therefore isn’t analog any more.”
Jupiter 8 clone: https://www.muffwiggler.com/forum/viewt ... p?t=209322
Minipops 7 clone: https://www.muffwiggler.com/forum/viewt ... p?t=199360
ClapTrap clone: https://www.muffwiggler.com/forum/viewt ... p?t=202248
www.nabla-instruments.com

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Boogie
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Post by Boogie » Sat Dec 08, 2018 4:32 pm

Updated the preference list.
Anyone who would like to see a Through Hole od SMD version of this voice board ?
You can still add your name to the list.

TH
1. Fitchie
2. aabbcc
3. tobb
4. JanneI
5. Jaytee
6. djs
7. Eric the Red
8. Level5
9. gianni
10. Fredp
11. Arnoid
12. boops
13. Chrutil
14. devinw1
15. CliffordMilk
16. peloazul TH or SMD
17. magman
18. makhho
19. KlangGenerator
20. 4floorsofwhores
21. Nidas
22. D33K
23. muffdiver
24. Chrutil
25. sduck
26. devinw1
27. ST.P
28. NekoNeko

SMD
1. Revok
2. grenert
3. Starspawn
4. mOBiTh
5. mangros
6. Chrutil
7. peloazul
8. amir
9. Portabella
10. YannickD
11. muffdiver
12. DisappearHere
13. groove
14. duff
-------------------------------------------------------
“Digital generated ‘analog’, is missing its analog soul and therefore isn’t analog any more.”
Jupiter 8 clone: https://www.muffwiggler.com/forum/viewt ... p?t=209322
Minipops 7 clone: https://www.muffwiggler.com/forum/viewt ... p?t=199360
ClapTrap clone: https://www.muffwiggler.com/forum/viewt ... p?t=202248
www.nabla-instruments.com

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Boogie
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Post by Boogie » Sun Dec 09, 2018 3:02 pm

Some single voice pads.
Oscillators are beautiful tracking CV without sync.

http://soundcloud.com/boo-gie-879149310 ... evoicepads
-------------------------------------------------------
“Digital generated ‘analog’, is missing its analog soul and therefore isn’t analog any more.”
Jupiter 8 clone: https://www.muffwiggler.com/forum/viewt ... p?t=209322
Minipops 7 clone: https://www.muffwiggler.com/forum/viewt ... p?t=199360
ClapTrap clone: https://www.muffwiggler.com/forum/viewt ... p?t=202248
www.nabla-instruments.com

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Sunshine Jones
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Post by Sunshine Jones » Sun Dec 09, 2018 4:53 pm

This is getting exciting...

Can't decide about TH or SMD, pre built or DIY without seeing what it will cost (artist,) and involve (enthusiast,) but the prospect is just thrilling...

I'm so very interested in this.

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boops
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Post by boops » Mon Dec 10, 2018 2:59 am

Imho,dont forget that the charm of the big analog synth ,obx,P5. Cs Jp that i use and well listened, is that the voices are not always perfected calibrated ,filter ,sometime light detune,in mono or polymode,Roland jp synths are often stable thought
when we will listen all the voices of this clone together,we will be surprise ,i hope in the good way
Last edited by boops on Mon Dec 10, 2018 9:36 am, edited 1 time in total.
FS :custom buchla 203 style càbinet ,skiff new design,boat ,hardware for diy cabinet ,easel case ,new 1u to 10u to 56u and more. / New 208 buchla card 12 /
HQ small case buchla psu PCB
https://www.muffwiggler.com/forum/viewt ... 93#3118393
https://www.muffwiggler.com/forum/viewt ... highlight=

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Boogie
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Post by Boogie » Mon Dec 10, 2018 5:49 am

@boops
that the voices are not always perfected calibrated
That should also be with this design.
Jupiter8 is using a 12 bit (I believe) Control Voltage, so the smallest step is some 4 cents up and 4 cents down. This is where the nice oscillator interference comes from.
I will be using a 16 DAC for the controll voltages, but this can be decreased by software.
I absolutely understand the oscillator fading is something one wants, so of course it should be in there. Thus 8 voices should sound as a chorus of 16 oscillators. 8-) Let's find out when I'm getting there.
-------------------------------------------------------
“Digital generated ‘analog’, is missing its analog soul and therefore isn’t analog any more.”
Jupiter 8 clone: https://www.muffwiggler.com/forum/viewt ... p?t=209322
Minipops 7 clone: https://www.muffwiggler.com/forum/viewt ... p?t=199360
ClapTrap clone: https://www.muffwiggler.com/forum/viewt ... p?t=202248
www.nabla-instruments.com

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StillNotWorking
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Post by StillNotWorking » Mon Dec 10, 2018 7:22 am

Which is already several bits better precision than we can expect to get from the control surface using short travel faders and small rotary knobs. It's all about developing smoothing tables pleasant to the ear. Maybe voices should not share these tables but rather select a random table from multiple?

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