Does the number change when you use RMS On or Off? Does the number change with setting PostFX On or Off? Both under 'Level Meters' in the right blue panel.

Yes, the numeric display shows the RMS value matching the Meter Bar ( -22dBFS)

Further testing shows some interesting behaviour.

• Duplicating this AVB Stream into other Inputs on the DF AVB does not duplicate this behaviour.
• Patching this channel (ch9 on the 12Mic) into other AVB stream channels does not result in this behaviour.
• Any channel from the 12Mic into this channel of the DF AVB results in this behaviour. (ruling out a DC / Preamp issue)
• Unpatching the 12Mic from the DF AVB Stream removes the issue.
• Connecting other 12Mic or AVBTool mic inputs to this stream and channel on the DF AVB does not exhibit this behaviour.

It seems that Totalmix is reporting an incorrect RMS on this channel, and this channel only, regardless of source of input. As previously mentioned, neither the AVB Web interface nor DigiCheck NG show this issue.

I should add that I am at 96kHz, and that this input on the DF AVB is Stream 2, channel 9. TM Channel 21

I didn't think DigiCheck NG had this instrument - doesnt appear to be an option.

Did this and the resultant audio file shows a an RMS of -117, and a peak of -101

Here is a movie of the behaviour.

What is being shown is TotalMix channels 21-22, which are receiving AVB Stream #2, Ch 9 and 10.
I have patched the 12Mic output CH9 into the Stream channels 9 & 10 so both these two TotalMix channels are receiving the same content over AVB. You can see that they are different.

I start with no 48v or Gain. Then I switch in 48v, then add a mic, and add some gain, then pull the mic out and switch off the 48v.

To avoid damages on your equipment you really shouldn’t plug in/out the mic with activated phantom power!

Thanks. We will try to reproduce and research how this is happening.