NTS aired an episode dedicated to the music of Index on 11 March 2021. Index has been played on NTS over 30 times, featured on 18 episodes and was first played on 19 June 2016.

Index were a psychedelic/garage rock band from Grosse Pointe, Michigan. Started around 1966 by Jim Valice, Gary Francis and John B. Ford (aka John Ford IV), with Tom Ballew joining later.