1. Peter Cetera's bass is somewhat out of the pocket, especially on the intro of the song. He's usually a little ahead of the beat throughout the song, although there times when the bass and drums settle in pretty well together.
2. The bass part changes in the second verse and becomes more active, as it does during the guitar solo, something that's easy to overlook when the rest of the tracks are in the mix.
3. The sound of the bass is pretty cool, with lots of leakage from the drums into the amp mic, since this was recorded in the days before widespread direct box use.
4. Terry Kath was as great a vocalist as he was a guitar player. Here he does ad libs right along with his lead vocal, and it sure sounds like it was done all in one complete take.
5. His guitar solo is one of his best (and one of my favorites). Take notice of the tone - not too distorted and using the front pickup of the Gibson SG he used at the time.
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