Don, I will admit I can play many tunes in different keys. However, I cannot play any tune in any key.
One of the more difficult keys for tenor sax is Db. "Body and Soul" is written in that key and any tenor man I've ever heard play it, he did it in Db, that includes me. It sounds best there too, to me. I play "I Cover the Water Front" also in Db. However, I cannot think of many of the most popular tunes written in Db.
If any one knows of a blues chart played by any saxplayer in B, D, Db, Gb, Ab or A, I would like to know of it. I would like to compare it with a chart they did in Bb, Eb, F, G, or C and find out if they can play as well in those tuff keys.
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I'm not prejudiced, I hate everybody!! Ha ha! My Sister-In-Law had this tee shirt. She was a riot!!!