ARC OF A DIVER (LP)Solo performer: Steve Winwood (vocals, various instruments). Recorded at Netherturkdonic Studios, England. With a glorious voice that sounds as if he has just swallowed a jar of cod liver oil, Winwood has the advantage of instant recognition; add to this a musicianship that has been employed in dozens of sessions over the past four decades, and the result is a prodigious talent that runs like a vein of gold through rock music since the Spencer Davis