Richard Wright, who played the keyboard and wrote music for classic albums The Dark Side Of The Moon and Wish You Were Here, died aged 65 after a short battle with cancer.
Speaking shortly after his death was announced, Pink Floyd guitarist Dave Gilmour said his musical partner and friend was "gentle, unassuming and private".
He added: "His soulful voice and playing were vital, magical components of our most recognised Pink Floyd sound.
"Like Rick, I don't find it easy to express my feelings in words, but I loved him and will miss him enormously.
"I have never played with anyone quite like him."
In the early days of Pink Floyd, Wright was seen as the group's dominant musical force, composing masterpieces such as The Great Gig In The Sky, and Us And Them.
"Without Us And Them and The Great Gig In The Sky, what would The Dark Side Of The Moon have been?" Gilmour said.
Update: The Times has just published a last, beautiful interview with Wright.