I am replying to myself because I want to share this solution.
We found a solution that can be suggested to others who are having the problem of sending musical output from an L-12 mixer to Zoom-for-Meetings.
This is relevant to those who are using mixers to process their sound for Zoom-for-meetings (I use a Zoom L-12 as a mixer). I have struggled for months to get the Reverb and EQ through to Zoom-for-meetings). The sound on Zoom-for-meetings) is very clear but without EQ and Reverb effects. Nothing worked to get the signal to Zoom-for-meetings that included those things. The normal USB output is before the EQ panel so the signal to your computer doesn't include it. If you add reverb with a pedal prior to the mixer, you will have reverb on your voice, but the EQ is still valuable for instruments, particularly the guitar.
In the latest release of Zoom-for-meetings, there is a new feature under Audio settings. There is a way to select the channels that are sent to the Zoom for meetings. I have a 12 channel mixer (the L-12) but when I do a channel select on Zoom-for-meetings I shut off channels 1-12 and use channels 13 and 14 to send to Zoom-for-Meetings. I know that it seems strange that 13 and 14 exist on a 12 channel mixer, but apparently this is fairly typical. It is an amalgamation of channels 1-12 and it INCLUDES reverb and EQ. I am now getting better sound on Zoom for Meetings when we play.
Please see the photos for Zoom for Meeting settings.
