Antonio Di Motta
Member
Hi John, I was testing REW 5.20 beta 25 on Ubuntu 18.04 PC system and external Sound Blaster SB1240 sound card on USB bus,
I connected the cables between output and input and after calibrating at 48Khz sampling rate I verified the correct calibration by tracing the response curve from 2 Hz to 22Khz.
I noticed that on very low frequencies up to 10Hz there are slight oscillations as if the answer was not compensated correctly.
For completeness, I always performed the impedance calibration with the relative curve with the Rsense standard values = 100 RLeads = 0 Rinput = 20K with the loop between input and output.
I attach the files so that you can view them as soon as you have some time ..
thanks a lot
I connected the cables between output and input and after calibrating at 48Khz sampling rate I verified the correct calibration by tracing the response curve from 2 Hz to 22Khz.
I noticed that on very low frequencies up to 10Hz there are slight oscillations as if the answer was not compensated correctly.
For completeness, I always performed the impedance calibration with the relative curve with the Rsense standard values = 100 RLeads = 0 Rinput = 20K with the loop between input and output.
I attach the files so that you can view them as soon as you have some time ..
thanks a lot