Ted. I remember mentioning in that thread (must have been a long time ago) that my first encounter with this WAS in a Nashville studio. The guys (and I do mean GUYS) scribbled all the info down on matchbook covers! I know enough about human nature to recognize guys being sooo cool! ha ha!Works though.
One little note though. I don't think they indicated the seventh (flat 7) or even the sixth....that was implied contingent upon the song. Same with minor sevenths, and in those days a minor sixth would have been seen as a communist conspiracy. A major seventh was written as "1 M7". I think the minor chords just used a "minus" sign.
Rick