Jeff Beck

'Live in Japan 1973, Live in London 1974' arrives on Sept. 15.

Rod Stewart, Ronnie Wood and others also performed.

Cover version was recorded not long before Beck's death in January.

Already confirmed guests include Rod Stewart, Billy Gibbons and Derek Trucks, among others.

Former bandmate says late guitarist was untouchable at his best.

Aerosmith guitarist managed to 'adjust the karma' nearly 40 years later.

"He was a musician that I always loved," Joel said on stage in New York City.

Guitarist played nice with others - many others - throughout his 60-year recording career.

Few other artists made such a seismic impact on the medium.

More than a decade after the Jeff Beck Group broke up, they found common ground again.