Simon.
by any chance have you come across a list on the net of multi client capable audio interfaces.
i did a search yesterday , and could not find such a list. it seems so many manufacturers dont state if they are MC.
might i suggest , if pg have one, they post the list as a sticky, cos this multi client need where people are useing multiple music software at the same time, is not going away.

i know rme are MC. but obviously too pricey for lots of project studios.
i "think" at the budget level NI komplete is , please confirm.
what about maudio's ? or the nice motu m2/m4 ?

lets see if bernier has more info bout his pc.
best regards.
oldmuso

my songs....mixed for good earbuds...(fyi..my vocs on all songs..)
https://soundcloud.com/alfsongs
(90 songs created useing bb/rb)
(lots of tips of mine in pg tips forum.)