The Keeley 30ms Automatic Double Tracker is a stereo effect pedal that provides an array of studio-style doubling effects, aimed at creating thicker and fuller sounding instruments. It features a vintage chamber reverb that simulates famous studio sounds, making it versatile for guitar, bass, keyboards, and even vocals. Designed by Keeley Electronics, this pedal brings classic automatic double tracking techniques onto the stage, emulating the sounds famously pioneered by musicians at Abbey Road Studios. Users can control various effects, including altered tunings and detuned voices, resulting in stunning output whether in mono or stereo. The pedal incorporates unique modes like the Abbey Mode for lush sounds and a Slapback Mode for striking echo configurations, giving musicians extensive creative possibilities.