Most music stores carry the cable that you need to connect to your pc through the joystick port. There are also USB devices, and plug in cards & boards for every budget. To start with - get the simple cable ($25)
Check your manual for the correct sound set to use for GM - the SQ16 does NOT power up in the GM mode for sequence use. I think it was sound set number 2, if I remember correctly. Double check me on that.
Just remember - "out to in", and "in to out".
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