Moody Blues Co-Founder Ray Thomas Dies

Ray Thomas, a British flutist and singer-songwriter who co-founded the Moody Blues, whose psychedelic mix of synthesizers, guitars and classically-inspired orchestral arrangements helped establish the genre known as progressive rock in the late 1960s, died Jan. 4 at his home in Surrey, south of London. He was 76, and was scheduled to be inducted into the Rock and Roll Hall of Fame with his bandmates in April.

His music labels, Cherry Red Records and Esoteric Recordings, announced the death but did not disclose the cause. Mr. Thomas said in 2014 that he had been diagnosed with prostate cancer.

Mr. Thomas performed in rock and blues bands in the English city of Birmingham before founding the Moody Blues in 1964 with fellow musicians including keyboardist Mike Pinder and guitarist and singer Denny Laine.