Sony MZ-R55

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To verify that your computer is running the necessary Apple 
Audio Extensions, close all open applications. On the desktop, 
find the icon that corresponds with your Mac hard drive. Double 
click on it. A window will open listing all the files and folders on 
your hard drive. Scroll down and find the System Folder icon. 
Click on the arrow to the left of the System Folder icon so that all 
the folders contained in the System Folder become visible. 
Scroll down until you find the Extensions folder and click on 
the arrow to the left of the folder icon. In the files that are listed 
in the Extensions folder, scroll down and verify that a file Apple 
Audio Extension
 appears. Check that the version of this file is 
1.0.5 or higher. If a version column does not appear, go to View 
in the top navigation bar and select View Options. Place a 
check next to Version in the Show Columns section. Click OK
A version column will now appear and let you check the version 
of the Apple Audio Extension file running on your computer. If 
your system is not running Apple Audio Extension 1.0.5 or 
higher, the PCLink may not operate.
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After verifying that your computer has the necessary operating 
system and audio extensions, close all applications. Plug the 
supplied USB cable into a USB port on your computer. Now plug 
the PCLink into the other end of the USB cable. Do not plug the 
PCLink into a USB hub, as other devices on the hub may effect 
the digital audio data running to the PCLink, causing unwanted 
pops and clicks in your recordings.
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Your computer will now automatically initiate the PCLink and 
set it as the preferred playback device. After a few seconds, you 
should notice that no audio will come out of your computer 
speakers. If you can still hear sound coming out your computer 
speakers, verify that you are running the minimum operating 
system and Apple Audio Extensions requirements. The 
installation of your PCLink is now complete. Please proceed to 
the next section, “Recording to MiniDisc” (page 11).