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 Forum index » Instruments and Equipment » Metasonix
+/- 5 to +/-10?
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erich



Joined: Jan 08, 2007
Posts: 58
Location: US
Audio files: 1

PostPosted: Mon Jun 01, 2009 12:18 am    Post subject: +/- 5 to +/-10? Reply with quote  Mark this post and the followings unread

I just got a moog mp-201 pedal that outputs CV's that range from +/-5V. I was reading the wretch manual and it looks like it works best using ranges that are +/- 10V. Is there a module that anyone knows of that allows you to expand the range of the CV's run through it? I am sure there is something like this, but don't know where to start looking.

Thanks for any suggestions
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thermionicjunky



Joined: Dec 07, 2006
Posts: 72
Location: san francisco

PostPosted: Mon Jun 01, 2009 6:48 pm    Post subject: Reply with quote  Mark this post and the followings unread

It would be an easy circuit to build, but some VCAs will double the output at full gain. Most are really VC attenuators, but my Modcan VCAs can do this. I have a couple of Synthesizers.com Signal Processors for amplifying CVs to the VCAs in my TM modules.

You have a Eurorack modular, right? Ask the manufacturers or look for manuals for their VCAs. Actually, the Plan B Multi-tasking Audio Processor is DC coupled and the top section will attenuate or amplify signals in attenuator mode. Plan B is having nightmarish delivery and PR problems right now, but you can see if Big City Music has it in stock, or look for it used. Some pissed off customers are selling off their Plan B right now.
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erich



Joined: Jan 08, 2007
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Location: US
Audio files: 1

PostPosted: Mon Jun 01, 2009 7:42 pm    Post subject: Reply with quote  Mark this post and the followings unread

Actually, no, I don't have a eurorack modular. I have 3 cwejman modules, including an envelope I've never used, because I don't have a power supply for the only the few cyndustries modules I have. I just have a little doepfer power supply for the cwejman modules that only powers up to 4 modules. It's a real hodge podge. I may break the envelope out because I could actually do some things with it anyway. Why are people mad with plan B? You have a link handy? You have a moog voyager as well don't you? The MP-201 seems great so far, but yesterday was the first day I had it. Oh, one more thing, how much do I need to worry about control voltage levels when mixing from different manufacturers? If I ever get my Cyndustries modules up and running, I'll need to figure out what levels they need. It may be on the website, but if it's not, Cynthia can get busy and be hard to reach.

Thanks
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thermionicjunky



Joined: Dec 07, 2006
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Location: san francisco

PostPosted: Mon Jun 01, 2009 8:40 pm    Post subject: Reply with quote  Mark this post and the followings unread

Well, regarding Plan B, there are dozens of people who have spent hundreds or even thousands on modules that they never received, or sent in modules for repair which have been cannibalized to make new modules to sell to other people. Distributors have been dropping Plan B, some of them losing money. Here's an electro-music thread, which is just a spill-over from the Muffwiggler forum:
http://electro-music.com/forum/topic-34275.html
But, the Multi-Tasking Audio Processor will do what you need it to do ... if it works ... a lot of people have received defective modules, and I've already described the repair process. This is the Model 25:
http://www.ear-group.net/model_25.html
You can look for a used one, run it with your Cwejman, and find a repairman if it breaks. Paul from MOTM has informally promised to take a look at any defective Plan B modules so people don't have to deal with Peter Grenader.

Concerning voltage levels, the Moog gear is the most sensitive. It's related to supply voltage. The manuals for my Moog Ring Modulator and Control processor (no Voyager) warn against voltage in excess of 6 volts (5 provides maximum effect). Eurorack runs on 12 volts, so some signals from 15 volt systems can hurt them (Synthesizers.com/MOTM), although Euro envelope generators produce higher voltages (around 8v to 10v) than Dotcom/MOTM (5v). Cyndustries is hard to gauge, as they designs come from all over. Most modules are in Modcan format, which runs on 15v and primarily uses 5v signals, like Moog, rather than 10v signals like Synthesizers.com and MOTM. However, Cwejman modules are probably engineered well enough to have over-voltage protection. If you do get the Cyndustries stuff running, it won't be too difficult to run the Synthesizers.com Signal Processor off the same supply. You'll just need to account for the different connectors. STG Soundlabs is producing a universal power distribution board that has Synthesizers.com, MOTM, Modcan and Doepfer connectors, though he won't install the Doepfer connectors with anything else because everything else is 15v.
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thermionicjunky



Joined: Dec 07, 2006
Posts: 72
Location: san francisco

PostPosted: Fri Jun 12, 2009 7:26 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hey, Doepfer is working on an AC/DC amplifier module that can be switched between a maximum gain of 1,2 or 4 times the input level. It's called the A-183-3 Amplifier.
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