I have always used REW with a calibrated ECM8000 mic and a Steinberg UR22MkII sending the output from the UR22 to the analog input on my AVR for the speaker being measured. That setup used Input 1 and Output 1 as loopback. Input 2 connected to the mic and output 2 connected to the analog AVR input for the appropriate speaker channel.
I wanted to be able to take measurements more easily by using ASIO on the same laptop as above and send the signal to the AVR via HDMI from the laptop. I was able to load ASIO 4 All and use the ECM8000 with the UR22 sending the signal via HDMI. The issue I have run into is that something is wrong with the time delay relative to loopback. In this setup, Input 1 and Output 1 remained as loopback. Input 2 is the mic and the laptop connected HDMI is sending the signal to the AVR.
Previously, the delays were consistent with the distances between the driver and the mic. Using the HDMI connection, the time delay is way out of what should be measured.
For example, using the original connections, I was getting delays of about 4 or 5 ms. With the Laptop connected via HDMI, I am getting delays on the order of 60ms.
Is this problem a result of the way I have the connections via the UR22? Which is the simplest way to be able to use HDMI for sending the REW signal.
The reason I have gone down this path is that I may be replacing my AVR and some of the newer options do not have analog multi-channel inputs.
I wanted to be able to take measurements more easily by using ASIO on the same laptop as above and send the signal to the AVR via HDMI from the laptop. I was able to load ASIO 4 All and use the ECM8000 with the UR22 sending the signal via HDMI. The issue I have run into is that something is wrong with the time delay relative to loopback. In this setup, Input 1 and Output 1 remained as loopback. Input 2 is the mic and the laptop connected HDMI is sending the signal to the AVR.
Previously, the delays were consistent with the distances between the driver and the mic. Using the HDMI connection, the time delay is way out of what should be measured.
For example, using the original connections, I was getting delays of about 4 or 5 ms. With the Laptop connected via HDMI, I am getting delays on the order of 60ms.
Is this problem a result of the way I have the connections via the UR22? Which is the simplest way to be able to use HDMI for sending the REW signal.
The reason I have gone down this path is that I may be replacing my AVR and some of the newer options do not have analog multi-channel inputs.