A spokesman for the Cardiff coroner said: "We are aware of his death and are awaiting a report from the police. It is too early yet to say whether we will hold an inquest."
Pitney's musical influence was far-reaching. He had 11 Top 10 hits in this country including That Girl Belongs To Yesterday and Looking Thru The Eyes of Love.
His songs have been recorded by some of the world's biggest stars - Hello Mary Lou was released by Ricky Nelson, Today's Teardrops by Roy Orbison, and Rubber Ball by US singer Bobby Vee and Britain's Marty Wilde.
He worked with the Rolling Stones and is credited with helping them find fame in the US.
His 1963 hit Mecca is viewed by many pop historians as being a precursor to psychedelia in its use of Indian musical sounds, two years before the Beatles began to adopt Indian influences into their records.
It has also been suggested that David Bowie's Ziggy Stardust persona was a reference to Pitney's flamboyant vocal range and mannerisms.
In 2003, he recalled dropping in on a Rolling Stones session in the early Sixties.
He said: "It was a very unique session... I had stopped in London for one day on the way home from Paris ... the session came off, a little bit drunken, the Not Fade Away session.
"Phil Spector showed up in a big black limo and I had to laugh because they give him credit for playing the maracas ... when he was playing an empty cognac bottle with an American half dollar, that was his instrument."
In 2002, Pitney was inducted to the Rock'n'Roll hall of fame.
