I have a similar problem with no audio, but it is an HD621+ G61R issue and is with the centre channel + sub channel measurements in REW.

I was wondering if anyone has solved the issue that only L, R and sub measurements can be made with speakers set all small, and never centre and sub individually. I have a 3.4 system.

I've used FlexASIO and Java and even though in Windows all channels are available only L,R alone or together with/without subs work.

Last edited by Carl; 2026-04-09 14:39. Reason: Moved to it's own topic
Home: BDP-103,G61R, HD621, Quad520f, 2xInnersound amps, 3xQuad ESL-63s, 2xJL Fathom F112 V1 subs, 2x Gradient SW63 subs.
iFi Zen Stream , Audeze LCDi4.