The Driver Is Displayed as "Unspecified" after
Installation
If the driver was not installed correctly, it may be displayed as "Unspecified" in some cases. Try the installation
method described at the link below.
The Driver is Displayed as "Unspecified"
URLs contained in this manual are subject to change without notice. If a link appears to be broken,
contact your authorized Roland DG Corp. dealer.
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Do you have a question about the GR-540 and is the answer not in the manual?
Questions and answers