I found a nice acoustic song on www.mysongbook.com and was just thinking to try to create a bassline over it[I also added the file, which can be opened with a file called Guitar Pro if any of you should have it; the bassline in it is my pathetic attempt at supporting that tune, so you can mute it ]. The thing is, it has some weird chords in it. Well, I'm sure they are actually very common, just that I haven't had a change to familiarize myself with written music yet(If anyone knows a place on the 'net, where I could find easier tunes to practice reading bass clef - that is welcome too). I got puzzled by this C/F written on top of a bar. The guitar chord there is xx3010 - so FGCE. I imagine the root for the bassline should be C, but why is that F written there? There's also a Bm/-5 chord(x20431) which puzzles me even more. -5? The song is in Cmaj according to the composer. Also the chord progression (1 per bar) goes like this: C G Am F C/F Dm Bm/5- Dm F G Dm Bm/5- C C Am C if that means anything on how to handle these chords. Also, if you have anything else to point out regarding the progression, please do so. I probably should add that there's another guitar doing melody over this all, but it's a bit too complicated for me to take apart theory-wise I'm afraid.