I would concur with Simon on this - the Interspace Industries PC Balancing Box can be used 'in reverse' as it is a passive DI box, so getting balanced LTC into Catalyst with one of these just needs a gender changer.
http://interspaceind.com/component/v...category_id=20


Also you can use these with analog output. Some sound people have a problem with 3.5mm jacks, however, and would rather use something more 'grown up' like a USB or Firewire interface - although I personally don't see the difference between using a 3.5mm jack and a USB or Firewire plug. The USB/ Firewire Interfaces do give you the option of getting audio in separately from your LTC, should you want to, and multichannel audio out.

The choice of audio interfaces you can use is vast.
I have recently used:
MOTU Ultra-Lites
http://www.motu.com/products/motuaudio/ultralite-mk3
But have lots of experience with
Edirol FA101
http://www.roland.com/products/en/FA-101/
The Motus are nice because they are easy to rack mount.

You will need TRS Jack to to 3 Pin XLR M for audio out for many USB/Firewire boxes.

I have also used these:
http://www.arx.com.au/International/audibox_usb_io.htm

Very good and very quiet (i.e. no noise) - I did a couple of 3 or 4 minute VERY loud battle sequence in Earls Court with these chappies. An excellent product.

Best wishes,

Hugh