Guitar Effects Pedal G2.1MA Michael Amott Signature Edition Downloads Images Documents Zoom G2.1MA Operation Manual (English 15 MB) Zoom G2.1MA Patch List (English 390 KB) Zoom G2.1MA Firmware History (English 17 KB) Zoom G2.1MA USB Subsystem History (English 20 KB) Software Firmware Zoom G2.1MA Firmware Version 1.13 (Mac 1.35 MB) Zoom G2.1MA Firmware Version 1.13 (Windows 434 KB) USB Subsystem Zoom G2.1MA USB Subsystem Update (Windows 32 bit, 6.13 MB) Zoom G2.1MA USB Subsystem Update (Windows 64 bit, 6.23 MB)