24 ch analog input to AudioLan Output

Yes, It should work in USB interface mode.
The delay must be depend on the buffer size of the driver. Couple of milliseconds excepted (around 5ms)
BTW I’ll forward your request to our developers because I think it make sense to have D/A; A/D option where no USB drive connected to the uTrack24 and the device also not connected to the PC/MAC in this case the delay can be around 1ms