The song I meant was "Hey You"
correct..that's a fretless
correct..
David Gilmour, Pink Floyd guitarist, played a fretless bass on Hey You.
of course thats not to say it can`t be done on a fretted bass..may sound a bit different on the sides...
anyway, I`m not sure how exactly he got that perticular sound on the bass..I do really like it though..