midi LOGGER GL220QuickStartGuideGL220-UM-851 Thank you for choose the midi LOGGER GL220. This QuickStartGuide describes the basic operations. Please refer to the manual (PDF) in the CD-ROM for more information. Checking the Outer Casing After unpacking, check the GL220's Exterior to make sure that there are no crack or other damage before use. Checking the Accessories o QuickStartGuide : 1 o CD-ROM : 1 o AC cable/AC adapter : 1 Setting and Checking the AC Line Frequency Don't forget to check the setting Set the AC line frequency inthe “OTHR” menu. This setting (50 or 60 Hz) affects the noise reduction performance of the device.