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Custom Summing Matrix
Old 17th January 2007
  #1
Gear Head
 

Question Custom Summing Matrix

Hey, I was wondering if any of you guys had any ideas about this:

I work for a film scoring and mobile recording company. We record large orchestras for film scores and classical recordings. We are looking to get a custom bussing matrix built that will allow us to combine multiple line-level signals.

Here's what we need:

- 24 line inputs on XLR's
- a solo and/or cut on every channel (which ever is cleaner or easier -- both would be ideal)
- 6 mono busses
- 2 stereo busses
- a pan control
- a signal present led?
- XLR outputs
- fits into a standard 19" rack

We would be using the console to bus signals after the preamps, into ProTools. For example, 3 violin spot mics to one track or 4 woodwind mics to a stereo pair. We don't need level control, eq, dynamics, auxes, bus masters or metering. Of course, the cleanest, highest quality, signal path would be ideal.

Any ideas about what it would take to do? Any recommendations for a tech to build this? Transformers or ? We're still brainstorming, so any ideas are welcome.

Thanks!
Josh
Old 17th January 2007
  #2
Lives for gear
 
7 Hz's Avatar
Surely just getting a mixing desk is going to be better? Seems like a bit too much stuff for a custom rack job. Maybe there are already rackmount units that will do this anyway?
Old 17th January 2007
  #3
Gear Head
 

Yeah, we currently use a SONY DMX-R100 for this and it works great, though it is limited to 8 busses. We're also forced to use the SONY's converters, which sound great, but the flexibility of an analog solution would be nice.

We've looked at some of the small analog desks, TOFT, Speck, Millenia modular, etc. But they usually don't have all the options we need. They also have a lot of features that we don't need -- mic pres, eq, auxes, etc...

A custom solution would be pricey, but there is the budget for it -- if it is exactly what we need.

I'm also curious about the different strategies for something like this (active vs passive, transformers vs ?, etc). I'm not much of a tech so I'd love to hear your ideas. Thanks!

Josh
Old 17th January 2007
  #4
Moderator
 
Tim Farrant's Avatar
 

Josh, we may be able to help you with this, check your PM.

Cheers
Tim.
Old 17th January 2007
  #5
Lives for gear
 
Cojo's Avatar
 

Quote:
Originally Posted by Albro Swift View Post
Here's what we need:

- 24 line inputs on XLR's
- a solo and/or cut on every channel (which ever is cleaner or easier -- both would be ideal)
- 6 mono busses
- 2 stereo busses
- a pan control
- a signal present led?
- XLR outputs
- fits into a standard 19" rack
Looks like you are describing a Tonelux rig...
Old 17th January 2007
  #6
Quote:
Originally Posted by Albro Swift View Post
Hey, I was wondering if any of you guys had any ideas about this:

I work for a film scoring and mobile recording company. We record large orchestras for film scores and classical recordings. We are looking to get a custom bussing matrix built that will allow us to combine multiple line-level signals.

Here's what we need:

- 24 line inputs on XLR's
- a solo and/or cut on every channel (which ever is cleaner or easier -- both would be ideal)
- 6 mono busses
- 2 stereo busses
- a pan control
- a signal present led?
- XLR outputs
- fits into a standard 19" rack

We would be using the console to bus signals after the preamps, into ProTools. For example, 3 violin spot mics to one track or 4 woodwind mics to a stereo pair. We don't need level control, eq, dynamics, auxes, bus masters or metering. Of course, the cleanest, highest quality, signal path would be ideal.

Any ideas about what it would take to do? Any recommendations for a tech to build this? Transformers or ? We're still brainstorming, so any ideas are welcome.

Thanks!
Josh
How about this:

A Soundcraft Delta 200 19" rack frame. Remove the group modules and load it with 12 stereo or dual line input modules. The six aux's will give your mono outs. The stereo and aux busses are differential and offer -90 db crosstalk with very low noise and distortion. That is very important if you like to retain orchestral imaging. The only "mod" is you have tip/ring/sleeve balanced inputs instead of xlr's. The console is ground compensated so no ground looping problems with other gear.

This rig will easily outperform the ProTools converters.

I imagine this rig would run well under $1500 used. I got my small one for $400.

Jim Williams
AudioUpgrades
Old 17th January 2007
  #7
Gear Guru
 
RoundBadge's Avatar
Quote:
Originally Posted by Cojo View Post
Looks like you are describing a Tonelux rig...

Yep.
completely modular..configure any way you want it.
and it sounds f*ckin great.
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