Some potential additions

[freixas]

I just learned some things about the UMC404HD that you might want to include in your diagram.

The XLR/TRS combo input apparently treats any XLR connection as a MIC input. Signals received when an XLR connector is plugged in are not affected by the Line/Inst switch, so the signal line you've drawn is not correct.

I'm guessing that there is an internal boost to the MIC signal before it merges back into the signal path. It appears that the signal merges back before the Pad switch/ Whether you want to show the internal MIC gain on the diagram or not is up to you.

You can test this yourself: a MIC connected with XLR is not affected by the Line/Inst switch. It is affected by the Pad switch.

Another thing I learned is that the phantom power switch only sends power to the XLR portion of the connector. This is very useful to know. It means I can leave my MICs connected with phantom power enabled while also connecting line outputs from another device. As long as I use a TRS cable, there's no problem.

I hate to complicate the diagram further, but splitting out the XLR and TRS portions of the inputs might make representing both these items much easier.

[mcnster]

Thank you for your kind analysis. I will update the diagram when I get a Round Tuit[tm]. ;-)

Michael

[mcnster]

Working on it now...

[bugith]

@freixas I feel my update addresses your comments.