On the Radio Today Programme this week, Absolute Radio's Chris Martin meets with the legend Johnnie Walker about his Guest Night at the New Town Theatre (www.newtownedfringe.com) for this year's Edinburgh Fringe from 1-25 August. They also discuss producing shows, preparing for interviews, Alternative Johhnie Walker, podcasting, the future of radio, advice for those breaking into the industry and interviewing Art Garfunkel.