I assume it goes something like
AoIP audio -> ST -> Marian Trace Alpha -> digital in to transmitter
Is ST, for example, DANTE compatibie? The MTA card?
No - ST is not DANTE compatible (wish it was though -- Hanz??) but it is extremely easy to introduce AoIP into the mix by using Audinate VIA (virtual soundcard and router).
My present configuration -:
AoIP network -> VIA -> Stereo Tool # -> LLQ VIA -> AoIP network
# -> MPX AP192 -> TX
VIA is a great way for one to get their foot into AoIP to learn. Audinate have both Virtual Sound Card and VIA options for Windows/MAC.
The other nice thing about VIA is that you can distribute the IN/OUT anywhere and it will provide a backup "Master Clock" to the network (which is typically your on air console or other) meaning you can take it offline for maintenance without bringing your entire AoIP network down.
AoIP is 48k/16bit (or 24bit for some devices) so it is no good for MPX. Typical stereo signal (2x AoIP channels) will add ~ 2Mb of Multicast traffic to your network (along with clocking/signalling overhead). On a Gig network this is not much.
(An AoIP newbie but loving the flexibility of it and how it allowed the removal of 6 distribution amps and 2.5kms of audio cables)