Hi
We have this problem, major issue for us. We bought this desk to playback multitracks via usb DAW and cant do it because of the digital buzz.
Have had to buy a Connectivity Iconnect Audio 4 and play 4 tracks back through that(ios into audio interface) with old school analogue outputs.
Not cool Allen and Heath, I thought of getting rid of it to upgrade to SQ6 buy now i find it has the same issues. WOW!!!!!!!!!!!!!!
Not cool Allen and Heath, not cool
Tony