The estates of Jimi Hendrix’s one-time collaborators have sued Sony Music UK accusing the major – as the licensee of the Hendrix catalogue – of copyright infringement, while also seeking allegedly unpaid royalties.We knew this dispute was brewing, because last month the Hendrix estate and Sony went to court in New York seeking a declaratory judgement that agreements reached in the 1970s with Noel Redding and Mitch Mitchell – the other two members of the Jimi Hendrix Experience – were still valid and enforceable.Those agreements were negotiated in the years after Hendrix’s death in 1970. In them, Redding and Mitchell basically gave up any copyright or royalty claims in relation to recordings made by the Jimi Hendrix Experience in return for “significant monetary consideration”.