I'm not sure why there's such a negative reaction to this material? When musicologist find an heretofore unknown work by Mozart, it's interesting, regardless of whether it's high quality Mozart. A new sonnet from Shakespeare is by definition a major find even if it's bad Shakespeare. Now Jimi Hendrix is not at the same level as Mozart and The Bard, but even forty years after his death he's still considered the greatest rock guitarist EVER. So even his worst material is of interest. Basically, Jimi tuning his guitar is more interesting than 50% of anything any other rock guitarist ever played.
