Audio guru Charlie Miller will participate in an Ask Me Anything on Reddit’s Grateful Dead subreddit at 7 p.m. PT on June 7. Miller has had a hand in the release of hundreds of Grateful Dead live recordings available via Archive.org.

Charlie’s skills aren’t limited to taping and mastering as he’s also run sound for a number of artists including Steve Kimock. Miller will respond to queries about the Grateful Dead, his more recent appreciation for Phish, his time behind the soundboard and any other questions Redditors can think up. Look for a thread on the Grateful Dead subreddit around 7 p.m. PT on June 7 to ask Charlie Miller anything.