Cartridges and phono settings

[thumb5]

Do you have any idea why the reading of the Devialet meters and the one from Audacity through Usb are so different? My d250 with phono connected not playing show a noise of -100dB -90dB if I check the same thing through the Audacity recording meter it show noise up to -57dB.

Well, dB is a relative measure so my first question would be: relative to what? Maybe the noise as measured by the Devialet is relative to its full output and the noise measured by Audacity is relative to some fixed reference (e.g. 775 mV rms).

Just a thought. Someone will soon correct me if I've got this wrong...