IR Extraction Failures

[redcoat28]

Hi all,

First post so be gentle. I am a relatively new user to Audiolense and just recently acquired a MOTU Ultralite MK5 to use for playback and measurements. Unfortunately, I am having trouble with IR extraction errors at the end of measurements. To provide more context, I am using a Windows laptop for measurements using the MOTU ASIO driver. I am able to successfully obtain a measurement from my front right and left main channels alone, but when I add a subwoofer and a digital crossover into the mix, I invariably end up with IR extraction failures. If anyone has any ideas as to what might be going wrong or things I might try I would appreciate it. Thanks.

 

[juicehifi]

One or several IRs are missing from the measurement.

This can typically happen if either the microphone feed is not working or one or the speakers are not rendering a proper signal.

 

[juicehifi]

Perhaps you could post a screen shot of the impulse and frequency responses from a successful stereo measurement, so we can verify that it is OK. It will help narrow down the field of potential problems...

 

[redcoat28]

Bernt thanks for your help. As soon as I get home from work will post the impulse and frequency responses.

 

[redcoat28]

Bernt, let me know if you need any other screenshots:

 

[redcoat28]

Bernt just to add some further information as I was doing more troubleshooting: when the measurement sweep plays through my left speaker I get an indication of sound in the microphone input monitor in Audiolense but even though the measurement sweep plays through the right speaker and sound is coming out of it I get no indication of that in the Audiolense microphone input monitor. Not sure if this is related or not. This is when running a simple 2.0 sweep.

 

[juicehifi]

Everything seems to be ok here.

Under the “advanced” menu you can reset the latency to 0 ms. It can get carried away when this error is reported.

Does the check speaker connection give the desired results?

 

[redcoat28]

Yes, check speaker connection gives the appropriate results. It seems your suggestion has eliminated my IR extraction issue but now I am getting other measurement errors as follows:

Any thoughts on what might be causing this?

 

[juicehifi]

This looks like your mic was connected to another channel than the one in Audiolense.

 

[redcoat28]

Bernt your comment prompted me to do a factory reset of my interface. All is good now. Thank you very much for the help. Much appreciated.