Avid 192 I/O question ???
 

A friend of mine is running PT9/HD3 with an Avid 192 I/O.

Installed in the 192: Bay-1 is the 8 channel analog Input card; Bay-2 is the 8 channel output card; and Bay-3 is the 8 channel Digital I/O card.

Currently, he has connected 16 channels of mic pres connected to the 8 Channel of Analog IN and 8 channels using the ADAT IN on the Digital I/O card.

My Questions: is it possible to use the OPTICAL ADAT IN via the Enclosure Connector to get another (8) channels of input into Protools? Giving a total 24 inputs simultaneously?

Thanks,

Re: Avid 192 I/O question ???
 

Absolutely not, this is a 16x16 interface defined by the TDM2 bus protocol that Digilink uses. The 192 IO manual does a good job describing how you can use the 192 IO chassis and card digital IO connections. The solution is you buy another 192 IO, they can be found very chealy.

Re: Avid 192 I/O question ???
 

The limitation is in the DigiLink, which carries 16+16 for two daisy-chained interfaces for total of 32+32. You just need to choose which 16+16 you wish to use per interface.

Re: Avid 192 I/O question ???
 

Okay, thanks for the info.

Though, what is the difference in the OPTICAL ADAT that comes standard on the Enclosure card and the optional ADAT IN on the optional Digital Card?

Re: Avid 192 I/O question ???
 

No difference. But with 8ch on enclosure and 8ch on card you can have 16ch total if that is what you are looking for, without need for extra digital card. ADAT is limited to 48kHz on 192 interface, no SMUX

Re: Avid 192 I/O question ???
 

All very well described in the 192 IO Manual.... which you need to read. PDFs are a google away.

Re: Avid 192 I/O question ???
 

^^ what he said.

Bug long story short -- only difference between enclosure and digital card connectors is that enclosure AES is 96kHz 2-channel max and has XLR connectors, compared to 8-channel DSUB 192kHz on digital card.

Re: Avid 192 I/O question ???
 

Some of the info is here and some is incorrect.
There is a difference between the enclosure and the option card optical connectors.
The option card optical port only accepts 48kHz and will SRC to whatever session sample rate you are using. It also only outputs 48kHz. It has realtime sample rate conversion. It is also not switchable to optical SPDIF.

The enclosure optical port has no realtime sample rate conversion. It is also switchable to optical SPDIF (2 channel) instead of ADAT where it can go to 96kHz. However, in ADAT, it is also restricted to 48kHz.

Overall, ADAT on the 192 interfaces is restricted compared to other hardware makers who do >48kHz (DS/QS). I remember back when these were everywhere people thinking they were doing 96kHz just because their session was set that way but transferring via ADAT.

The Avid IO line of interfaces rectified this.