The noisiest module in my setup is the lamination buzz of one of my
power supply transformers. Drives me nuts so I just have to turn my
synth up louder. I run my supplies lightly loaded, with one power
supply per cabinet. My cabinets are 24U. Each cabinet has one power
supply in the center and a MOTM-960 distribution board on each side so
I can use the shorter power cables. Each power supply is loaded
somewhere between 40% and 60% of maximum rated current. I did have
turn-on issues with a couple of the power supplies where they would
crowbar with the capacitive loading and so I sequence each of the
MOTM-960 distribution boards so I am only powering on half the modules
at a time.
Filters and amps are all quiet. I detect no noise related to my UEG
and that power supply is at 40% load. I do have just a bit of hum in
my spring reverb since I can't get quite enough distance between the
transformer and my reverb tank - makes it sound authentic!
Everything in my synth setup runs off of one AC outlet. I do have a
ground isolation box that I use when routing audio to my studio gear.
It is needed with some gear, and other gear is OK without it.
I'd suggest (if easy) pulling a number of power cables, and connecting
them back in small groups to see when your noise returns. I know I
had to do this with my studio gear. Turns out the noise generator was
one of my AC protection power strips. I also found that if I run the
backlight of my computer LCD screen at less than 100% it puts a
horrible buzz in my audio. That took a long time to find.
Dave
--- In
motm@yahoogroups.com, michael stein <michael_david_stein@...>
wrote:
>
> Dave wrote: "I'm running five power supplies so I did try to keep
the filters and
> vcos on a single supply without any other modules that could
> generate noise or current variations (as in blinking leds)."
>
> I would like a little more info on this. I have noisey amps and
filters. Another problem I have that someone may know how to
troubleshoot is that my Encore UEG's create little tick noises as they
advance from stage to stage. I have 2 and they both do it. This could
be from the noisey amps but I think I remember it happening without
the amps in the signal flow, any ideas?
> Thanks,
> -michael-
>
>
>
>
>
>
>
>
> djbrow54 <davebr@...> wrote:
> My layout reminds me of the Smithsonian. I had a great
organization
> and then I outgrew my structure and have expanded into two overflow
> buildings.
>
> I started with oscillators grouped together on the left in the
> middle cabinet and filters on the right in the middle cabinet. The
> lower cabinet was for my control and modulation sources so keyboard,
> envelope generators, lfos, etc. The top right cabinet I reserved
> for +5 modules (since that's where the triple supply is) and my more
> complex modules so ribbon, MIDI-CV, Miniwave, TimeMachine, etc. I
> also put my VCAs so they'd be close to my filters.
>
> Then the order ended. I had my analog interfaces on the left to be
> close to the reel-reel which is now on the right. My overflow
> cabinet has filters, lfos, controllers, preamps, and mixers. I did
> put both of my programmable controllers in one case on a dedicated
> power supply.
>
> I found with my cabinets that the physical aspect of the module had
> a lot to do with placement. My spring reverb needed to be on a side
> so the reverb tank was as far away from the power supply as
> possible. My deeper modules needed to be in specific locations to
> avoid the power supply and power distribution boards. The short
> modules needed to be in front of the power supply. +5 modules need
> to be in the cabinet with the triple power supply.
>
> In retrospect, the only thing that made patching easier was to group
> the modules that tend to have dedicated interconnects. The envelope
> generators all need triggers and gates. The filters and vcos all
> need 1v/oct CVs so I put multiples in the centers of these module
> groupings.
>
> I tended to move modules around to try and keep a logical order but
> eventually decided this was too much work for too little gain. I
> did replace all the screws with 5/16" and plastic washers to not
> mark up the panel faces.
>
> I'm running five power supplies so I did try to keep the filters and
> vcos on a single supply without any other modules that could
> generate noise or current variations (as in blinking leds).
>
> Dave
>
>
> --- In motm@yahoogroups.com, "wjhall11" wrote:
> >
> > All - we want to develop a page on our site to present
> philosophies
> of
> > synth layout. We want to present your expert thoughts on the
> subject
> > (and thus also benefit from them ). So - for instance - when
> you
> > put your modules into your synth cases, what do you group together
> and
> > why? Do you put your Oscillators at the top, filters below? Why?
> > What have you found to be most intuitive / ergonomic? Can you
> point
> > us to publications on the subject that have influenced you? Thank
> you
> > all. Bill and Will
> >
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
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