A really good example of how sophisticated a simple rhythm guitar part can become is Aerosmith's "Same Old Song And Dance" from their Get Your Wings album. It highlights the really excellent production skills of Jack Douglas.
Here's the isolated tracks of Brad Whitford's rhythm guitar. Listen for:
1. The simplicity of the parts. Everything is played as solidly and simply as possible, with no embellishments or ghost notes.
2. The change in guitar sounds. The sound changes considerably from the intro to the verse to the chorus to the bridge. This gives the song more interest.
3. The change in panning. As the sound changes, so does the panning, again heightening the interest.
4. The doubling of parts of the solo and last chorus to bring the song to its peak.
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