I am puzzled about where I should be applying my effects, and whether there is any detrimental effect to summing effects in serial. Let's say I have guitar, bass, and drum tracks, and that they benefit from some processing. Should I be treating them individually, say by soloing the track and adding effects there, or should I be adding reverb and compression to all of them in the stereo bus? If I add subtle effects on the tracks, can I then put effects on the stereo bus, or is there a hazard to summing them like this? I am looking for some kind of general idea about where I should be putting such effects.