IHi all, watched a series many years ago (maybe 2000's), on Channel 4 I think. It was about songwriting and music, and showed how the effect and feeling of a piece of music could be changed by altering a few notes, or, say, changing the key from major to minor. It had a male presenter who would demonstrate using popular songs from the Beatles etc., that he would play or sing himself (he didn't sing very well, I seem to remember, but the points he made were very clear and interesting).
I would love to find it again but haven't the faintest idea what it was called or who presented it. Anyone?