Drone and Pedal Tone Chords on Piano: 5 Songwriting Moves
A drone or pedal tone is a bass note that stays fixed while the chords above it change, and Jason Zac shows five ways to use one on piano: drone cadences, modal drones, line-cliché drones, melodic chord drones and modal interchange over a single bass note.
Key points
- A drone or pedal tone is a bass note that stays the same while the chords above it change.
- Familiar cadences such as IV-I and V-I sound fresh when played over the tonic in the bass, e.g. G/D to D.
- Choose chords containing a mode's characteristic note, such as E major over D for Lydian's G#.
- Line clichés move one upper note chromatically down or up over the drone for calm or rising tension.
- Groove the drone, use it to extend a chord, and save it for a specific section of the song.
What this lesson teaches
A drone or bass pedal tone is a bass note that never changes while the harmony above it moves. If you are in D, you keep D in the bass even when the right hand plays G major or A major. This is different from an inversion, where you rearrange the notes of a chord. With a pedal, the bass is simply constant.
In this lesson Jason Zac of Nathaniel School of Music shows five ways to build harmony over one pedal note, using D as the drone almost throughout. Beginners will find the theory useful, while intermediate and advanced players should play along at the keyboard. The sound is common in progressive rock (Genesis, Yes, Rush, Dream Theater), in the Beatles, and in Indian music, where the Sa and Pa drone underneath.
1. Cadence drones
Take a short, familiar cadence and keep the root of the key in the bass instead of moving the bass with each chord.
- Plagal (IV to I): in D, play G major over D (G/D: G B D in the right hand, D in the bass) and resolve to D major. Try G minor over D going to D major for a minor-major colour.
- Authentic (V to I): A major over D going to D. It sounds open and dreamy rather than classical.
- V, IV, I: A/D, G/D, then D, a very progressive-rock sound.
- bVI, bVII, I: Bb over D, C over D, then D.
2. Modal drones
Work out the triads of a mode, keep its root in the bass, and find the chords that bring out its character.
- D Mixolydian (major scale with a flat 7): C major (bVII) and G major (IV) over D, or A minor (v) to G to D. This can feel raga-like.
- D Lydian (sharp 4, which is G#): alternate D major and E major over D. E major works because it contains G#.
- D Phrygian (flat 2, which is Eb): move between D minor and Eb major over D, or F major over D.
- D Dorian: G major, D minor and F major, all over D.
Invert the chords so the top note moves stepwise through the scale and forms a natural melody.
3. Line-cliché drones
Start on D major with D on top, then move that top note down chromatically while the bass stays on D: D, C#, C and onwards. This gives D, D major 7th, D dominant 7th and further colourful chords. It is calm and works well for ballads.
For more intensity, move an upper note up instead: A to A# (D augmented), to B (D6), to C (D7). This leaves the music hanging, ready to change chord or resolve.
4. Melodic chord drones
Pulse D in the bass and think of a simple tune, such as F#, E, G, F#. Harmonise each melody note with a I, IV or V chord (D, G or A major) that contains it, inverting the chord so the melody note is on top. For example, G major can be voiced with D, G or B as the top note. This gives a glam-rock, stab-like sound. Add suspensions too: Dsus4 uses G, Dsus2 uses E, and Gsus4 uses C.
5. Modal interchange over one drone
Because a single bass note does not force a major or minor chord, you can switch scales freely above it: Dorian, Phrygian, Lydian, Mixolydian b6, Aeolian, Mixolydian. Use darker modes for struggle and brighter ones for release, telling a story with melody over the same D. Even if it never becomes a full song, it makes a strong prelude.
How to practise and use drones
- Groove the bass. Rather than just holding the note, make a riff with root and octave, add the fifth, or add the flat 7 or natural 7 depending on the scale.
- Extend a chord. When one chord lasts a long time, keep its bass and move colours above it so it does not sound static, then do the same on the next chord.
- Reserve drones for one section. Use them for an intro, verse, bridge or build-up, then explode into a full chord progression in the chorus, or the other way round.
Questions about this lesson
What is the difference between a pedal tone and an inversion?
An inversion rearranges the notes of the chord so a different chord tone is in the bass. A pedal tone keeps one bass note fixed, usually the root of the key, no matter which chord plays above it.
How do I play a plagal cadence over a drone in D?
Play G major (G B D) in the right hand over D in the bass, written G/D, then resolve to D major. You can also use G minor over D going to D major for a minor-major contrast.
Which chord brings out the Lydian sound over a D drone?
E major over D works well because it contains G#, the sharp 4 that defines D Lydian. Alternating D major and E major over the D bass gives a clear Lydian colour.
How can I stop a drone from sounding boring?
Turn the bass into a groove or riff using the root and octave, perhaps adding the fifth or the seventh. Also keep moving the upper harmony and use the drone only for certain sections of the song.
Practise it
- Cadence LibraryCompare piano cadences across keys and listen to how different chord movements create closure, suspense or a turn in a new direction.
- Chord TreesStart from a note and explore related chords, inversions and voicings.
- Piano classes at Nathaniel School of MusicLive online or in Bangalore, with a teacher.
- All free music apps40 practice tools for harmony, rhythm, ear training and more.
Related lessons
- 15 of the Most Popular Chord Progressions on Piano (Major, Minor and Modal)Popular piano chord progressions in the key of F include I–vi–IV–V (F Dm Bb C), I–V–vi–IV and its rotations, ii–V–I, the minor i–bVII–v–bVI, the Andalusian i–bVII–bVI–V, the Dorian i–bIII–bVII–IV, the Mixolydian bVII–IV–I, the 12-bar blues, the Canon progression and the line cliché.
- One Trick, Endless Piano Progressions: Reharmonise I–IV–V Across Many ScalesBy playing each chord of a I–IV–V progression as either major or minor, you get 2 × 2 × 2 = 8 different progressions, and each one points to its own scale, such as major, natural minor, harmonic minor, Dorian or Mixolydian.
- Relative vs Parallel Minor on Piano: Two Ways to Unlock New MoodsA relative minor keeps the same notes as its major key but moves the home note to the sixth degree (C major to A minor), while a parallel minor keeps the same home note and flattens the third, sixth and seventh (C major to C minor).
- Truly Understand Modes From 2 Easy PerspectivesYou can understand modes in two ways: treat each mode as its own scale built from one root by changing intervals, or keep one key signature, such as F major with Bb, and start on each scale degree to get Ionian, Dorian, Phrygian, Lydian, Mixolydian, Aeolian and Locrian.