External Mic Calibration Fail

vaughan

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Apr 5, 2021
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My AV System  
Preamp, Processor or Receiver
ARLS17
Main Amp
ARVS115
DAC
Naim
Universal / Blu-ray / CD Player
Oppo
Front Speakers
SF Cremona M
Hi,
I've installed REW on WIN64bit. Works well with using inbuilt microphone. The problem is when I connect an external mic (using M-Audio FastTrack box), I have issues. REW picks up the sound in the "levels" tab - "Ref In" shows signal but the "In" doesn't.

And so if I try to calibrate to an SPL, no signal is generated to the REW. My external SPL meter will be showing 80DB, with no signal to the REW. Any help would be appreciated. thank you - I'm sure it s a setting somewhere.

I've tried using the default device as the FastTrack in Win -and Windows picks up the mic, so its getting to the computer. Same issue if I use REW preferences as the default device or the Fast Track.
 

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