The Boss DD-500 digital delay has an analog dry-signal path, choice of buffered- or true-bypass operation, 12 modes that include basic delays, warm analog and tape-echo types, pattern-based effects, and modern delays that employ pitch shifting, filtering, and other processing. Each delay includes a semi-parametric four-band EQ, modulation, ducking, and other parameters. Its Vintage Digital mode offers emulations of classics from the ’80s including the SDE-2000 and SDE-3000 rack units from Roland and the Boss DD-2. Other features include a graphic display, patch memories, and MIDI. An independent Phrase Loop function offers up to 60 seconds of stereo recording time (120 seconds in mono).