sweep on right channel always stops

[genelec01]

Hello, while measuring the sweeps on left channel alway works perfectly, sweep on right channel always stop at 2.02kHz. Does anybody knows this issue?
Setup is MacBook Pro macOS Monterey > Topping D50s > PreAmp > Genelecs S30
Thank you in advance for help or suggestions
Best

 

[John Mulcahy]

Can you post an example mdat file showing that? Are you using a timing reference for your measurements? If the system has a of of latency a timing reference is needed so that REW knows when to start capture, otherwise the end of the sweep could be missed. Also make sure the sample rate in Audio Midi Setup for the input and output devices matches the rate chosen in REW.

 

[genelec01]

thanks for your answer, here the screenshots left and right.

 

[John Mulcahy]

Better to have the mdat file than screenshots.

 

[genelec01]

i will try

 

[genelec01]

got it!

 

[John Mulcahy]

Thanks. It is better to select the actual input and output being used on the REW soundcard preferences than to leave them as default. It is fine to use 256k sweeps, there is rarely a need to use 1M for acoustic measurements.

The truncation does look like the effect of missing the end of the sweep capture, though I'm not sure why the right channel would be affected any differently to the left. On the Measure dialog, "Timing", select "Use acoustic timing reference". Select the left channel as the "Ref output". That may fix the problem.

 

[genelec01]

Thank you very much for your help, I will try this later!

 

[genelec01]

Dear John, thank you very much for your help! with "Timing reference" and 256k it works flawless on both channels!
You made my day,
Greetings from Vienna

PS: paypal-donation is under way

 

[John Mulcahy]

Excellent! Thank you very much for the donation, very generous of you.

 

[dotnet]

The ESS DAC chip in the D50s will mute the output after the left channel has not had a signal for a number of seconds. Unfortunately, the auto-mute function is based on signal on the left channel only, and as far as I have found, cannot be disabled on the D50s.

When I had the D50s I kept an old cheap DAC around just for REW sweeps. I’m now using an AKM based DAC and don’t have the issue anymore. If you use shorter sweeps you may be able to complete them before the auto-mute kicks in.

 

[genelec01]

Hello Dotnet,
thanks for your information! This makes perfectly sense, because before, when I used REW with my Musical Fidelity DAC I didn’t had this problem.
Have a good time,
Genelec01