Typically, the National Association of Music Merchants’ annual trade show in Nashville is open only to its members, along with selected professional musicians, retailers, instrument manufacturers, sound engineers and the like. But this year, for one day only, NAMM opens its doors to all music enthusiasts, no matter what level, for a day of workshops, seminars and events — not to mention an opportunity to wander the endless maze of booths selling everything from high-end instruments and recording equipment to karaoke machines and stage lights. The Saturday seminars include “The Musical iPad” (an exploration of the iPad’s music-making and recording software), “The Mysteries of Writing Great Songs,” “Vintage Keys, Modern Software,” “The Secrets to Kick-Ass Guitar Tone” and a slew of other topics. Among the speakers are former New York Yankees player and Latin Grammy-nominated guitarist Bernie Williams and Nashvillians Ben Folds, Craig Krampf and Dave Pomeroy. Other events that caught our eye: the “World’s Fastest Drummer” competition, a screening of The Wrecking Crew (a documentary about the famed inner sanctum of L.A. session players) and our personal fave, a ukulele circle!