You probably know Harry Connick Jnr as a Sinatra-influenced popular entertainer, or if you’ve dug a little deeper you may have enjoyed some of his own compositions and witty big band arrangements on albums such as ‘Blue Light Red Light’, or perhaps even his entertaining run of self-penned funk albums. His career as a jazz pianist though has largely taken a back seat to all these other musical activities since his early 20s. But take a look at this duo concert with fellow New Orleans-born musician and childhood friend, Branford Marsalis, and wonder at what a huge loss to the jazz world that has been…