Problem with REW SPL Meter

[nikolaus]

Hi guys,
i am using a Apollo Thunderbolt plus the Sonarwoors Mic with its calibration File. When i star editing in preferences and test the Volume all is fine.
I put it to -12bd as is the output of rew.BTW is it better to turn up the Pre Amp or the Speaker level to reach that -12db?

Then i want to start measuring but it says i have to calibrate SPL meter first. When i try to do that it says my input is way too low. Actually the SPL Meter does not do much and shows negative values....
But i had a good input in the first place with -12db. Hope anyone can help me here. Thanks and best regards
Nikolaus

 

[nikolaus]

anyone,please?

 

[Wayne A. Pflughaupt]

Since you do not have a USB mic, SPL calibration will require an outboard meter.

Regards,
Wayne

 

[nikolaus]

Since you do not have a USB mic, SPL calibration will require an outboard meter.

Regards,
Wayne

thanks a lot for the answer! Sorry that i am asking this newbie questions but is a SPL calibration necessery for the room calibration? When is skip the SPL calibration REW tells me my input level is too low. How come? I made the adjustment for the mic input in first step right? Would it be simpler to buy a Room Analyzer Kit for example? is ths as accurate as REW?
Thanks a lot
Nik

 

[Wayne A. Pflughaupt]

Sure, you can measure without the SPL calibration. Just play the test signal through your system at a comfortable volume while doing the calibration process, and then enter something like “75 dB” in the “SPL Reading Calibration” box.

Regards,
Wayne

 

[John Mulcahy]

Could you post some screenshots of what you are seeing? Perhaps a screenshot of REW's SPL meter while playing a speaker cal pink noise signal on the REW signal generator, and also a screenshot of the REW soundcard preferences.