Morpheus is a guitar effects pedal brand known for polyphonic pitch-shifting stompboxes. Operating as a division of XP Audio, Inc., the company is based in Salt Lake City, Utah, and focuses on pedals built around proprietary polyphonic pitch-shifting algorithms that preserve harmonic accuracy across full chords rather than single notes only.

The brand's most recognized product is the DropTune, a polyphonic pitch-drop pedal that lowers tuning in half-step increments up to 3½ steps, plus a full octave drop and an octaver setting. Other notable releases include the Capo, a polyphonic pitch-up pedal that emulates a mechanical capo via a footswitch, and the Bomber, which pairs full chordal whammy-style bending with octave dive-bomb effects. The pedals are housed in cast-metal chassis with heavy-duty footswitches aimed at stage use.

Morpheus has positioned itself in the pitch-shifting niche alongside competitors like DigiTech's Whammy and Drop pedals, and its products are sold through major music retailers including Sweetwater, Guitar Center, Musician's Friend, and Reverb.

Morpheus has 5 products cataloged on Equipboard, including Harmonizer & Octave Effects Pedals and Modular Synthesizers. Their gear is featured by 12 artists, with the strongest followings in Rock, Metal, and Blues. Notable users include Brent Hinds, Adrian Belew, and Ola Englund.