The company is known especially for its DigiTech Whammy, first manufactured in 1989, which made foot-controlled pitch shifting effects possible. Since then, the company has expanded into making multi-effects units and guitar and amp modeling equipment, some of which, such as the iStomp, working in collaboration with iPhones and such; the iStomp is an effects pedal which allows users to download effects through their iPhone and make them playable via the effects pedal.
In 2004, DigiTech released an overdrive pedal entitled the Bad Monkey Tube Overdrive.
Digitech also produces the RP55 effects processor which is popular amongst beginners and amateurs due to its relatively low cost and rich feature set.
DigiTech was acquired in 1990 by Harman International Industries.