(Based on 
Give your guitar instant polyphonic drop tuning.
With the Morpheus Droptune guitar effect pedal, you can easily go from one pitch for a particular song to a different pitch on the next without having to retune your guitar or needing multiple guitars for various step-down de-tunings.
For example, play an E chord in standard tuning, then use this unique pedal to drop tune your guitar so the chord is changed to an Eb, D, Db, C, B, Bb, or A.
This lets guitarists get that heavy drop-tuned tone at different pitches without dealing with floppy string buzz, extra-heavy-gauge strings or carrying around expensive extra guitars. The same goes for foam-deadened acoustic guitars or electric violins.
If your singer has a bad throat night, you can drop-tune your guitar to accommodate him without having to change neck position or retune.
The Morpheus DropTune guitar pedal also features effect-toggling so you can instantly toggle back and forth between the dropped pitch and the EFFECT OFF for a cool up/down pitch-shift effect during solos or power chord rhythm patterns. Additionally, the DropTune pedal has Full Octave Drop and a great-sounding Octaver.
Don't mistake this for a mere pitch-shifting stompbox—the DropTune uses proprietary polyphonic pitch-drop algorithms that maintain perfect harmonic accuracy and tonally correct overtones. The DropTune was developed by a team of guitar effects pros with over 50 years of experience at other companies where they created some of today's most famous pedals.
With a cast-metal chassis; solid, positive-feeling steel switches; and non-skid rubber feet, the DropTune is solidly built for years of use and abuse. LED indicators are bright and easy to see.
Based on 
