[Steve Wargo] “We plan to use a Multibridge. The input for video is an HD-SDI connection. The input for audio is “4 x inputs on DB-25 for 8 Ch Sample rate converted”.
We need to take our mics into a mixer of some kind and it must have an output to a DB-25 connector”. So, I guess I’m a little gray on the “4 inputs being 8 channels.” Does this mean that it’s 4 stereo channels and not 8 discrete audio channels?”
Steve,
I don’t know what “sample rate converted” refers to. It’s sort of weird hanging out like that, but not unsual for a video box to not be very explicit about audio details.
OK, there’s only one DB25 shown on the extreme and it talks about 8 in-8 out. So I’m thinking it needs something like the Apogee cable below.
https://www.bhphotovideo.com/bnh/controller/home?A=details&kw=APAES8IFC&is=REG&Q=&O=productlist&sku=338832
That’s an Apogee breakout cable. Four AES in and four AES out. Each AES is a pair of channels. You could use a Yamaha mixer, which can be configured with the right I/O cards to feed and receive from the multibridge.
As for the AES 4 channel, 8 channel thing.
The spec for AES is audio in pairs.
My Aphex 1100 preamp has an AES out. In my Pro Tools system, I can designate each side to a different track. If the software of your system is capable of splitting the AES stereo pairs into individual tracks, you should be fine. It may do that with preferences or you may be able to unlink the tracks once you get them in your editing system.
How’s that?
Regards,
Ty Ford
Ty Ford’s “Audio Bootcamp Field Guide” was written for video people who want better audio. Find out more at https://home.comcast.net/~tyreeford/AudioBootcamp.html
or https://www.tyford.com