Jimi Hendrix’s ghost is said to be haunting an iconic recording studio he helped build. The ‘All Along the Watchtower’ rocker died aged 27 on 18 September, 1970, by choking to death after taking a huge dose of barbiturates – and his former engineers at the Electric Lady music hub in New York have insisted they seen several ghouls at the spot. Grammy-award winning mixer Michael Brauer told the New York Post: “Pretty much every assistant I know has had some kind of sighting late at night when they are alone.” He added he once thought he saw his assistant go to the lounge of the Greenwich Village…