Pedal to transpose chords

[Rnbfunk]

Hi can I find out if any one knows of a pedal that can transpose the pitch of the guitar. Instead of using a capo, I am looking for a device that can alter the pitch of the chords played. I tried a pitch shifter ... but it’s only useful when a single note is played. I am looking for one so that I can adjust the pitch of chords as I adjust to the key of singer

Advice appreciated

 

[Anasasis]

Get a digitech whammy dt or drop pedal. Whammy dt is better imo