[SOLVED] USB DAC Issue or Install Issue?

[radiooff]

The output from lsusb shows nothing connected.

To troubleshoot start with just a bare Pi and your USB dac (to rule out some sort of power issue). If lsusb still shows nothing connected then swap in a different Pi for example a 3B+.

Do you suspect a power issue because of the touchscreen?

I have tried each of the 4 USB ports on the RPi 4 with the M100 (externally powered) but using the touch screen. Would it be different if I turned on the HDMI and used my monitor instead?

I think I do have a 3B+ kicking around and a spare microSD, maybe I'll hook that up to my monitor...