How to let the K5200 flash to music?

As the title might suggest I would like to know if there is a (simple/inexpensive) way to attach some kind of adio signel to the external oscillator input of the K5200 Kit.
I tried to amplify my audio signal (coming from an mp3-player) but the lights would only occasionally flash. :frowning:
If somebody could show me a working circuit, or point me in the right direction, it would be greatly appreciated :wink:
Thanks in advance…

Is there nobody who can help me?

Maybe MK103 can be used to generate +5V pulses to the rhythm of the music.
http://www.velleman.eu/distributor/products/view/?id=337995