Question about The Music
You may have a blown fuse inside the unit. You will need to know how to disassemble it to replace. Good luck!
Posted on Nov 15, 2016
SOURCE: Need a manual for the Casio keyboard CTK 491 The
Try download here:
http://www.retrevo.com/search/v2/jsp/mytrevo/myTrevo.jsp?page=man
Posted on Jan 10, 2011
SOURCE: What kind of USB cable
You will need MIDI cable - widely available from good musical instrument (keyboard) stores and on the internet
For more information about using MIDI on your keyboard see the appropriate section in teh user's manual here
http://support.casio.com/pdf/008/ctk_491_01_e.pdf
Posted on Feb 10, 2011
What is the model of your sound card?
Posted on Mar 12, 2013
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