I can't seem to get the acoustic reference to flow through, normally works fine, nothing after 1 hour of checking and messing around

[IWC Doppel]

Any guidance much appreciated. My set up has worked for years, but not today. Not sure if I've changed a setting unowingly, looks fine seeing others ?

My set up is Umik>laptop, output laptop USB to DAC then DAC to signal in to analogue processor via RCA. I always use front left for the timing ref and have front left connected as usual on and working these are my setting and the sweep play through the R channel to the speaker to be measured but nothing to the front left for the timing ref

Any advice much appreciated

 

[John Mulcahy]

Do you get the timing signal if you send it to the Right channel?

 

[IWC Doppel]

John, Thanks, I'll try the right channel in this case it was connected to the subs (via the RF RCA) and there is a sweep with the R channel driving the subs plays, just no timing ref. In my experimentation I managed to get the sweep to come out of the laptop and a timing ref from from the L channel.I'll recheck all my connections again in the morning

 

[John Mulcahy]

Subwoofers cannot reproduce the timing signal, it is a 5 kHz to 20 kHz sweep. It has to go to a speaker.

 

[IWC Doppel]

John Tks, the left front is used for timing the R was fir subs. I found my problem, like an Idiot I must’ve accidentally turned off one of the preamp power supplies -Doh

Do all good now