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 Forum index » DIY Hardware and Software » MusicFromOuterSpace.com designs by Ray Wilson
Soundlab Ultimate - Build diary & difficulties
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magman



Joined: Feb 04, 2009
Posts: 361
Location: Liverpool, UK

PostPosted: Mon Feb 15, 2010 12:24 am    Post subject: Reply with quote  Mark this post and the followings unread

I'd be tempted to look at the Audio Mixer side of things for this.

If you put 3 more pots (1 for each VCO) into the mixer, you could connect pin 3 of the pots to the VCO outputs before the switch. This would allow you to individually mix the outputs of the oscillator as well as doing away with the switches.

In detail - for VCO1 - connect pin 3 of the pot R127 to X8 (for the Triangle output), bypassing the MXA connection. For the second output, connect X6 to pin 3 of a new pot. Connect pin 1 of the pot to ground. Solder a 200k resistor to pin 2 of the pot than run a wire to pin 2 of R128. There are a couple of similar ways that you can do this, but this will do for starters.

Repeat for VCO's 2 and 3.

It might also be useful to used screened cable to connect to the pots to reduce crosstalk (Ray does mention this as an option with the normal build). You can ground the screen on a convenient connection on the PCB, but only at the PCB end.

A little caveat here though, this is theoretical only, I've not actually tried this (Though I do plan to build an Ultimate and Expander later in the year with a bit of luck).

Regards

Magman
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LektroiD



Joined: Aug 23, 2008
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PostPosted: Mon Feb 15, 2010 3:33 am    Post subject: Reply with quote  Mark this post and the followings unread

Hi Magman, definitely a good alternative!

However, the reason I chose the crossfade method was due to not having to butcher the panel too much; variables would look ok in place of the switches, as the print would still make sense.

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ashleym



Joined: Aug 20, 2009
Posts: 181
Location: uk

PostPosted: Tue Apr 13, 2010 3:12 pm    Post subject: Reply with quote  Mark this post and the followings unread

I have got my circuit boards but I ended up ordering components from all over the place, Farnell, Mouser, Rapid and RS. Some of the rare resistor values needed searching out. RS had the SSM2210s and Farnell the LM13700s. Getting every value of ceramic cap with a 5mm pitch is driving me a little crazy, I might end up re-ordering some mistakes!!!

Because I am going for a coloured panel silver toggle switches wouldnt look right so I have gone for some rocker switches in the style of Minimoogs and ARP Soloists. You get a choice of colour and style of switch cap if that makes sense.

http://uk.farnell.com/jsp/level5/module.jsp?moduleId=en/311854.xml

They are a little larger than toggles resulting in some cramped panel action
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LektroiD



Joined: Aug 23, 2008
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PostPosted: Tue Apr 13, 2010 3:54 pm    Post subject: Reply with quote  Mark this post and the followings unread

I've finished my board now, just mounting the panel in the case and wiring up now

Posted Image, might have been reduced in size. Click Image to view fullscreen.


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LektroiD



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PostPosted: Fri Apr 23, 2010 4:02 pm    Post subject: Reply with quote  Mark this post and the followings unread

I have mismatching voltages coming from the PSU..

Unloaded:
+ 11.94V
G 0V
- 12.47V

Is this offset likely to cause any major problems?

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LektroiD



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PostPosted: Mon Apr 26, 2010 10:16 pm    Post subject: Reply with quote  Mark this post and the followings unread

Just finished calibrating the baby:

http://www.youtube.com/watch?v=wyp9bQeYL3U&fmt=18

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Thalassa



Joined: Jan 27, 2006
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Location: Spain
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PostPosted: Tue Apr 27, 2010 2:44 am    Post subject: Reply with quote  Mark this post and the followings unread

LektroiD wrote:
Just finished calibrating the baby:

http://www.youtube.com/watch?v=wyp9bQeYL3U&fmt=18


Congratulations Smile
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crazeydazey



Joined: Feb 15, 2007
Posts: 259
Location: England
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PostPosted: Tue Apr 27, 2010 4:51 am    Post subject: Reply with quote  Mark this post and the followings unread

AWESOME.....

I wish I was good enough to build one of those..

I started building a normal soundlab about 2 years ago, completed the board, came to wiring the panel and chickened out... it's just sat with lots of other circuits I have started and never finished Sad

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Thalassa



Joined: Jan 27, 2006
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PostPosted: Tue Apr 27, 2010 5:04 am    Post subject: Reply with quote  Mark this post and the followings unread

crazeydazey wrote:
it's just sat with lots of other circuits I have started and never finished Sad


It's something that I'm trying to avoid .... starting new project without finish the previous one

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crazeydazey



Joined: Feb 15, 2007
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PostPosted: Tue Apr 27, 2010 5:19 am    Post subject: Reply with quote  Mark this post and the followings unread

Thalassa wrote:

It's something that I'm trying to avoid .... starting new project without finish the previous one


good plan.. I think I'm going to spend some time finishing what I've started, then start a new project Smile

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loydb



Joined: Feb 04, 2010
Posts: 369
Location: Providence, RI

PostPosted: Tue Apr 27, 2010 5:33 am    Post subject: Reply with quote  Mark this post and the followings unread

Nice build!
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ashleym



Joined: Aug 20, 2009
Posts: 181
Location: uk

PostPosted: Thu Apr 29, 2010 5:23 am    Post subject: Reply with quote  Mark this post and the followings unread

Great youtube clip.

I had my Shaeffer panels delivered today, so apart from your musical talent I should have something similar ready to play soon.....ish.....
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ashleym



Joined: Aug 20, 2009
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PostPosted: Fri Apr 30, 2010 1:29 am    Post subject: Reply with quote  Mark this post and the followings unread

I'm not sure what is going on with attachments but hopefully you can see the panels I am using for my Ultimate/expander build. They are basically Ray's design but with a couple of minor changes. The second panel is the Expander and I have added the aux panels to this so all connections are on a front panel. This left me with a bit of panel real estate so I am adding a couple of variable voltage sources, a clock divider and a distortion unit.

The square cut outs are for the rocker switches I will use- I dont think silver toggles would work on my panel design. funnily enough the rocker switches are toggles with a cover!

More as it happens.


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LektroiD



Joined: Aug 23, 2008
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PostPosted: Fri Apr 30, 2010 4:07 am    Post subject: Reply with quote  Mark this post and the followings unread

ashleym, they look great! What did they cost to get made?
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ashleym



Joined: Aug 20, 2009
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PostPosted: Fri Apr 30, 2010 5:00 am    Post subject: Reply with quote  Mark this post and the followings unread

Many Thanks.

Don't be fooled....looks arent everything, I made a couple of layout errors but they wont affect the useability. Both panels delivered to my door were 250 euros, I will have to wait for my credit card statement for the exact £s. Not the cheapest but the quality is absolutely superb. The lettering is engraved and filled and it is razor sharp. I wanted a front panel I had a hand in designing to help put my own stamp of the instrument but I don't want to disrespect the huge amount of work Ray has put into the design. And I like blue.

As I progress I will put the Shaeffer files on line for people to have a fiddle themselves
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State Machine
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Janitor


Joined: Apr 17, 2006
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Location: New York
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PostPosted: Fri Apr 30, 2010 5:15 am    Post subject: Reply with quote  Mark this post and the followings unread

Just taking a peek here guys and really like the panels and that suitcase unit to. NICE !!! I have been using FPE for a while also and, yes, a bit pricy BUT superb quality. I use them in my profession also.

Keep up the nice work guys !! Cool

Bill
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LektroiD



Joined: Aug 23, 2008
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PostPosted: Sat May 22, 2010 8:35 am    Post subject: Reply with quote  Mark this post and the followings unread

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eXisteNz



Joined: Jun 08, 2010
Posts: 45
Location: Italy

PostPosted: Tue Jun 15, 2010 5:22 pm    Post subject: ultimate + expander Reply with quote  Mark this post and the followings unread

Hi i'm Nicola, i have 4 question about ultimate and ultimate expander and i would be very grateful to anyone can help me...

1) i have a doepfer midi to cv converter with one pitch output, i would to control all the three oscillators of the ultimate...it's possible to do that by connecting the output of the miditocv to the Expander's cv distributor input and connecting the three outputs in the 3 cvinputs of the ultimate's oscillators??

2) twisted pairs/shielded wire : the pcb's side of the ground goes to the holes with green squares, but where i have to connect the other ground panel side of the wire?

3) Since i play guitar, i think that i will use the external input to connect my guitar so i have to change r128,130,135,133,131 on the mixer section as ray suggested or the gain in quite good for an electric guitar?

4) what is the procedure to select the noisest transistor for the noise gnerator? i've read about ray's suggestion about those argument but i have no idea how i can do that!

thanks a lot in advance, cheers nicola
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