Pedal point (music)

Characteristics and types

Pedal points are categorized by their pitch and role. The most common varieties are:

• Tonic pedal — a sustained note on the tonic (the home pitch) that reinforces the key center.
• Dominant pedal — a sustained dominant (fifth scale degree) that often increases harmonic tension and anticipation of a cadence.
• Inverted pedal — a pedal placed above the other voices rather than in the bass; it serves the same structural purpose from a higher register.
• Double pedal — two pedal tones sustained simultaneously, commonly a lower and a higher pedal to thicken sonority.

How it works musically

Technically, a pedal point sets up a stable pitch against changing chords. When the sustained tone belongs to the concurrent harmony it sounds consonant; when the harmony moves to chords that do not contain that pitch, the pedal becomes dissonant and creates forward motion until the dissonance resolves. Composers exploit this process to build tension, highlight a cadence, or produce an aura of stasis. In performance, organists use the feet on pedalboards to hold tones, string players sometimes sustain open strings or repeated notes, and orchestral basses or tubas may be tasked with long pedal passages.

History and examples

Pedal points appear across eras. Baroque keyboard and organ repertoire makes frequent use of sustained bass notes; a clear example appears in J.S. Bach’s Prelude in C major from The Well-Tempered Clavier where a repeating bass pitch underpins arpeggiated figures. In Romantic choral and orchestral music, composers such as Johannes Brahms used prolonged low pedals to underpin climactic sections — for instance, the extended D's in the final movement of his German Requiem are often heard as a tonic pedal or as a drone-like foundation. 20th- and 21st-century composers and arrangers continue to use pedal points in film scoring, minimalism and popular genres to create hypnotic or driving textures.

Distinctions and related concepts

Pedal point is related to but distinct from a drone. A drone generally implies a continuous sonority that functions as accompaniment throughout a piece or tradition (as in bagpipes or some folk musics), while a pedal point is a harmonic device within a piece that interacts with changing harmonies. Also, piano notation sometimes indicates use of the sustain pedal with the marking Ped., which is not the same as a written pedal point — the latter is a compositional feature rather than an instruction to hold the instrument’s sustain mechanism.

Further reading and resources

1. Overview and definitions
2. Organ technique and pedalboard history
3. Tonic and scale-degree functions
4. Dominant harmony and cadences
5. Bach, Prelude in C major (example)
6. Brahms, German Requiem (example)
7. Orchestral low-register practice
8. Drone vs. pedal: comparative notes