Thanks Unicorn and thanks Frostbyte!
If someone is interested here is the SID file: http://dl.dropbox.com/u/7382601/Rock_n_Roll_Robot.sid
No voice though, karaoke ready!

Awesome! This is so cool haha.

This is SICK! Great job!

Being a fan of both Alberto Camerini and the C64's SID some years ago I covered up "Rock'n Roll Robot" (1981) using only this mighty chip and since then this file is floating around my computers begging to be finished but I never did.
Ultimately a pinch of limiting and here we are.
The song is basically made of two mono tracks, one is played by a C64C (8580R5 SID chip on board) loaded with SID Factory, thanks Laxity.  The other one is a recording of the same Commodore singing the song with BASIC programming and an Italian speech synthesizer called "La voce" similar to the better known SAM, thanks to the Systems Editoriale and Ready64 folks for this nice software.
There's actually a third track, only few seconds long, that I've used to double the main voice. It's done with an older C64 breadbox with a MOS 6581 inside that sounded better in my opinion, more musical in a way, but had the cassette port broken. I've found "la voce" only in tap format and wasn't able to port it to D64 so I couldn't really use that computer to sing.
Despite the title lyrics are Italian.
Hope you enjoy it, cheers.
http://soundcloud.com/ermangaver/rock-n-roll-robot