| Re: onkyo mic for rew?
The problem is that cheap mics like those supplied with a receiver do not have perfectly flat response. Therefore, in order to compensate for the mic's shortcomings, a calibration file is required to ensure accurate measurements with REW. In fact, the receivers also have built-in compensation for the mics they come with - that's why you don't get accurate results by using a Yamaha mic with a Onkyo receiver, for instance.
If you can get a frequency response graph of the mic, it's easy enough to create a calibration file. We've done the same thing for the Radio Shack SPL meters and Behringer mics we typically use with REW. That's not hard to do if you're using a mic from a know manufacturer, such as Shure or AKG. However, I expect that will be difficult with a receiver's mic, if not impossible.
You need an SPL meter to use REW anyway, because you can't set levels without it. That pretty much renders the question moot...
Regards,
Wayne
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