Zoom AMS-22 Operation Manual page 22

2.
Connect an instrument or mic. (→
3.
Adjust the input gain. (→
4.
Select the AMS-22 as the computer input and output device.
5.
To enable the loopback function, set
Connecting
Adjusting the input gain)
instruments, Connecting
to ON. (→
Enabling the loopback
22
mics)
function)