There are certain things that are somewhat hidden in your trusty C64, that sometimes only after many years surface and lead to great new things to do with your breadbox.
One of these is the strange “EXT IN” pin on the Commodore’s 6581 SID chip.
Great article and how to hook your iPod to a C=64.
http://www.mos6502.com/friday-commodore ... -to-a-c64/
YouTube : http://www.youtube.com/watch?feature=pl ... Jcjj4Tn8Ps