Compose an 8-bar chorus in **E minor**, 4/4, 128...

Parameters:

Provider: Anthropic
Model: claude-sonnet-4
Key: E Minor
Genre: Electronic

Compose an 8-bar chorus in E minor, 4/4, 128 BPM.

Track 1 – Piano chords

1: Cmaj9 (C2 G2 E3 B3 D4) – 4 beats
2a: Dadd4 (D2 A2 F#3 G3) – 2 beats
2b: Em9 (E2 B2 G3 D4 F#4) – 2 beats
3a: Am9 (A2 E3 C4 G4 B4) – 2 beats
3b: Bm7 (B1 F#2 D3 A3) – 2 beats
4: Cmaj9 – same as bar 1 – 4 beats
5-8: repeat bars 1-4 unchanged.

Track 2 – Lead melody (lyrical “arched” hook)

Sound & feel: soft synth or whistle-lead, legato articulation, velocity 75-85 with ±10 ms humanisation.
Register: A3 – C5.
Motif structure (2-bar unit, repeated)

Beat Bar 1 pitches Bar 2 pitches Musical intent
1-2 E4 (half-note sustain) Anchor on the tonic – singable entry.
3 G4 (♩♩) A3 (♪) B3 (♪) Step up a minor 3rd, then answer an octave lower.
4 A4 (♪) G4 (♪) F#4 (♪) D4 (♪) Rising 2nd; descending response outlines Dadd4→Em9.
Tie → E4 (half-note sustain) Resolve smoothly back to tonic.

Bars 1-2 & 3-4 – play the motif exactly as above.
Bars 5-6 & 7-8 – repeat the motif but raise the climactic note on beat 3 of bar 5/7 to C5, and end bar 8 on a long G4 instead of E4 for a gentle lift before looping.

The phrase remains simple and repetitive (two identical 2-bar “questions” plus two lightly lifted “answers”) but gains interest from the octave shifts and the single leap to C5, matching the chord changes without dissonance.

Last updated: 5/25/2025

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