There's a place for note-for-note, and a place for creative interpretation. Any artist has the right to interpret their own work, and come up with alternate versions. In cover bands, the good ones can and do get the overall essence of the song in their performance, even if it's not precisely note-for-note. In my band, we play "Money" by Pink Floyd. it's not precisely note-for-note, but it's close. The guitar player takes some liberties, but stays within Gilmour's style of playing. The bass line is so important to the song that I essentially play it note-for-note (probably at a level of 97-99%). There just isn't much room to alter it without losing the vibe. Our keyboard player plays the sax part on the keys, and it's close but not exact. The drummer is in the ballpark, but not exact in his part in the song. But the overall effect is "Wow! You guys nailed it exactly!" The overall is sometimes greater than the sum of its parts.
Years ago, in my learning mode, I learned Jack Bruce's part in "Crossroads" note-for-note, mostly for learning his style and to understand why the part worked so well in the song. i discovered a lot of it had to do with how Eric played his part. the two go together. have I ever played that part out? No, because of two things: No one I've played with has ever played Eric's part note-for-note along with a drummer playing Ginger Baker's part note-for-note (or beat-for-beat). If they were, I could and would jump in with Jack's part note-for-note. Why? Because I could. As it is, I've played the song, and played to what others were playing in it. It's not the same, but that's OK.
I play in a cover band, who does write a few originals. What we do, we do well. it's not note-for-note, but no one is complaining or dissing us for that. So I think we're doing something right....
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