I’ve downloaded the free 30 day trial of Audirvana for MacOS, and purchased the iOS Audirvana Remote. This is my experience of using the software...
My Mac Mini Server resides upstairs, while my Meridian system is located downstairs.
The route between the two is: Mac Mini > Devolo Homeplug (upstairs) > Devolo Homeplug (downstairs) > Meridian 210 > Meridian 218 > Meridian M6’s.
Once installed on my MM, Audirvana instantly identified my Meridian 210 on the network. Similarly, the 210 was identified on Audirvana iOS. Also, on the Meridian Control iOS app, I chose ‘Network’ as the source.
On playing Bob James Trio ‘Espresso’ (MQA) on my MM the MQA LED illuminated on my Meridian 218, and the album played through my M6’s.
On the downside, so far the Audirvana experience is no different than using ‘mcontrol’ iOS with an attached USB HDD on the 210.
On the Meridian IP app, entering ‘mcontrol://‘ enables the 218 to open mcontrol. By comparison, Audirvana doesn’t similarly work: as ‘Audirvana (R)’ is not one word, unlike ‘mcontrol’. I did try ‘audirvana _(r)’ to no effect.
With Audrivana in the mix, the sound isn’t as ‘clean’ compared to using mcontrol (as explained above).
Also, while using Audirvana, by my Wife switching on our Smart TV (UPnP), Audirvana caused the Meridian 210 to fall off the radar in preference to our Loewe Bild7. That is, Audirvana can only cope with a single UPnP device on the network. Pity.