Barbara Dennerlein is a German jazz organist. She has achieved particular critical acclaim for using the bass pedalboard on a Hammond organ and for integrating synthesizer sounds onto the instrument, and was described by critic Ron Wynn as "the most interesting jazz organist to emerge during the 1980s".

A pedalboard is a keyboard played with the feet that is usually used to produce the low-pitched bass line of a piece of music. A pedalboard has long, narrow lever-style keys laid out in the same semitone scalar pattern as a manual keyboard, with longer keys for C, D, E, F, G, A, and B, and shorter, raised keys for C♯, D♯, F♯, G♯ and A♯. Training in pedal technique is part of standard organ pedagogy in church music and art music.