Yes,
Just connect the keyboard's stereo output jacks to the computer's 1/8-inch, stereo, line-in jack on the sound card. You'll need an adapter cable to do this, which can be purchased at Radio Shack. Then double click the small speaker icon at the lower right corner of your computer's screen, click options, properties, OK, then select Line-In by placing a checkmark in the small box beneath the slider.
This will send the signal to the computer, however, you'll need some recording software to do the recording. Go to the link at the above post and you'll find details and links to recording software.
Good Luck,
Gary
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Travlin' Easy
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)