I noticed there is a difference in the Audio In format shown between the new iOS app and the desktop app. 
Whilst watching a program,  In the desktop app I am seeing Dolby Multi Channel PCM 2.0, but in the app it displays Dolby MAT 2.0

Why is this different in the 2 apps ?
Is there a simple guide that SONOS can provide to explain the different sound formats that are displayed.