Apparently, "Guitar Sound" is the theme song for the Full Disclosure podcast.

[kane_magus]

Heard it again on the car radio today, and this time it was a station break ad for the Full Disclosure podcast, which will apparently air on RadioIQ at 8pm on Saturdays. Looking some more into that podcast, it seems to be the case that "Guitar Sound" is indeed the theme music used for that, as it played at the start of the four or five of the podcast episodes that I played for a bit just to check and see.

So... that explains that, I suppose.