Roland cakewalk A-300PRO Owner's Manual page 14

Installing the Driver
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When the installation is completed, the "A-PRO Driver Setup" dialog
box will indicate "Installation has been completed."
Click [Close] to close the "A-PRO Driver Setup" dialog box.
If the "System Settings Change" dialog box appears, click [Yes]. Windows will
automatically restart.
Now let's check to make sure that installation was successful.
➝ "Checking with a SONAR Soft Synths (Windows)" (p. 19)
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