To quote a friend of mine, who knew him well…
"His shows were LIVE There was no ‘cut’ , no ‘take 2’…,Just live rock music and under his direction the cameras are able to catch great performances. It was a rock festival with cameras where the music came first! "
He didn’t play music, he broadcast it.
Live on TV, with stereo-tone simultaneously via the wireless, Europe-wide!
Not a big thing today, but a giant leap in those days!