Hi Elizabeth,
The easiest way to do what you want is to use the USB connection between your KN7000 and your PC - you don't need any extra hardware.
Install the Drivers, Song Manager and Audio Sound Recorder software, which is on the 'Applications and Drivers' CD, that came with your KN7000. You can then record your voice and KN7000 using the Audio Sound Recorder, since both are output from the USB port on the KN7000.
Full instructions for the installation of the software are on my website Tech Tips page :
http://www.willumspages.co.uk/page10.html Tip number 1 or 2, depending on your PC Operating system.
Follow the procedure Carefully...........
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Willum
After silence, that which comes nearest to expressing the inexpressible is Music.
Aldous Huxley