Cool. While my initial question is now answered, and my HD I/O now seemingly properly calibrated (using Signal Generator at Peak), let's get anal-rententive for a moment here.
Quote:
Originally Posted by Darryl Ramm
You are fine if setting against dBu. Just to be anal-retentive here. You would be off about a massive  ~ 0.7dB = 20 * log (1/(1+50/600)) by ignoring the 600 ohm load impedance if you were aiming for a 0VU reference. |
I'm not sure I understand this. Unless you are assuming a 50 ohm output impedance for the HD I/O outputs. And also assuming a 600 ohm input impedance for what appears to be a postulated (electromechanical?) VU meter. I can't see where else the 50/600 term in the denominator might come from.
I'm-a gonna open another thread on calibrating an Avid (actually digidesign) Pre.