View DigiTech RP155, RP250 and RP255 patch tones with this app! Ever at a jamming studio or a friend's place, and you wanted to play a song, but you couldn't get the tone right? You'd need a computer to open the patch tones. And it would need to be plugged to your multi-effects pedal. This app lets you view the tone, in similar arrangement to the pedal's layout.