If effects are being applied to computer audio playback through the BOSS GX-100, the output destination in the computer or software settings may be set to "GX-100 DRY (3L, 4R, or 3L+4R)". To play back computer audio without effects, select "GX-100 MAIN (1L, 2R, or 1L+2R)" as the output destination.
Note: Install the USB driver before connecting the GX-100 to a computer. Refer to "Connecting to a computer" in the GX-100 Reference Manual for details.