Two new Plan B products wil begin shipping in two weeks:1) The Model 9 Mixer/Attenuator is the forth in a series of utility modules from Plan B. A truly modular, multi-tasking 5 in, 3 output mixer, it's balanced inputs are suited for either AC signals or DC control voltages, or both simultaneously.
Along with these mixing options, each of the four main inputs channels are fitted with dedicated Attenuator Outputs which allow access to the leveled output from each channel by itself, independent of the mix. Many thanks to Plan B Norman Fay for thestellar idea of adding independent post fader outputs.
Go here for details.
2) The third in our utility module series, the Model 29 Dynamic Mult is a unique 1-to-5 signal splitter in which four of the outputs are equipped with manual level pots, allowing for both contour control and signal distribution. The perfect companion for non-attenuated VC inputs, the Model 29 requires no power supply connection to operate as it takes it's ground reference from the cables patched into it.
Go here for more details.
still havent fixed that voltage mirror info, peter????
ReplyDeleteWhat in the world would you need balanced inputs for? this seems like a disasterous choice.
ReplyDeleteWhat is the relationship between these and MMM?
ReplyDeleteIt's not balanced inputs in the sense you may be thinking, not as in audio. The internal output buffer's inputs are DC BALANCED - they will remain stable and accurate when summing multiple DC voltages.
ReplyDeleteI understand the term 'balanced inputs' was a bit misleading - it's explained in better detail on the mdule info page.
hope ths helps -
- P
still haven't gotten to a lot of things (the voltage mirror diagram included) it's on the list :)
ReplyDelete- P
there's no connection between MMM and Plan B. I just couldn't resist the MMModule thing in the title. Tiz the season...
ReplyDeletedid you have trouble aligning the graphics around the input jack for the 29?
ReplyDeletere: balanced
ReplyDeletei dont get it. specifically, what equal but opposing elements are being brought into equilibrium?
"did you have trouble aligning the graphics around the input jack for the 29?"
ReplyDeleteNo no - we overpunch the holes for the cliff jacks. This is just being excited to get the first article built and not obviously not taking the time for this important detail. You see, we leave slop and can I assure you they will be aligned in the center within 1/10 of a degree on the production units. I don't feel like reshooting this photo, so I will photoshop it for you for the picture. Does that meet your approval?
M29 photo fixed.
ReplyDeletewobbler said:
ReplyDelete"i dont get it. specifically, what equal but opposing elements are being brought into equilibrium?"
First and foremost, thanks for identifying yourself. It makes it difficult to address a thread when you don't know who's asking the questions.
DC Balancing an amp equalizes the input bias currents of it's + and - inputs, which regulates the DC offset. Doing this improves unity gain so what you get out is in fact a mixture of what's going in. WIth AC, we're talking offset that won't be heard unless severe. With DC signals, we're talking a completely different voltage coming out - offset either higher or lower than the input. In other words, with the signals levels were dealing with in the Doepfer realm you can get away with a certain amount of offset (20-40 mV) when mixing AC signals, but with DC you're screwed. This balance doesn't come free - you have to design it so it's nullified and we have with the M29. Because of that, the Model 29 is suitable for both AC and DC applications.
hope this helps.
- P
is it nulled with just a trim pot, or something more sophisticated
ReplyDelete!knob said...
ReplyDeleteis it nulled with just a trim pot, or something more sophisticated
I'll be happy to tell you, not quite sure why this would be any interest to an end user, but...
No need for a trim pot. Actually something less complicated is required. If the feedback resistor and + input resistors are of constant value (they are), the op amp's negative input biasing resister can be as well. It's the relationship between those three relative to the energy that's passing through them that does the balancing act.
hope this helps...
- P
erm, no qualms here, great job peter.
ReplyDeletei think the individual post fader outs is a fantastic idea
ReplyDeletemeh
ReplyDeleteOk! that's freakin' ridiculous how those anonymus messages are of an imbecile and totally useless reason... Man, however you are, you have no freakin' life, Plan b must be the modular company that released the most new modules in the last 6 months, all more artistically inclined than then the others... they're made to ease the modular performer's life onstage and are being created by sheer imaginative mind! So please mr/mrs kindergarten, grow up and really, really stop that nonsense whining of yours... You feel angry, sad, mad, repressed? Go play live, trash your controlers, make some noise, PUTAIN DE MERDE BE CREATIVE !
ReplyDeleteOh yeah!!! One last little thing!
ReplyDeleteI'd rather have new modules released every once in a while to make sounds and music with and have the voltage mirror diagram screwed up the way it is ad vitam æternam !!!! You do music with the diagrams on a product's webpage???? WELL I DON'T!!!!!