mcp_opendaw_create_rnb_arrangement
Create a full modern R&B arrangement with trap-influenced drums, deep sub bass, extended chords, and vocal-style lead. Produces a dark, atmospheric slow-burn track with half-time beat and minor key harmony.
Instructions
Create a full modern R&B arrangement — trap-influenced drums + deep sub bass + extended chords + vocal-style lead.
Contemporary R&B (The Weeknd / Frank Ocean / SZA / Brent Faiyaz) — dark, atmospheric, slow-burn:
Track 0: Drums — half-time R&B groove: kick on 1 with syncopated ghost, snare/clap on 3, triplet hi-hat rolls. Programmable feel — not live, but loose. Half-time at 68 BPM feels like 34 BPM.
Track 1: Bass — deep sub bass: long sustained root notes, occasional octave/fifth movement. More sustain than soul, less movement than funk. The low-end foundation — felt more than heard.
Track 2: Chords — dark extended voicings (min9, maj7, dom9, min7b5) on i-VI-III-VII minor-key progression. Rhodes/synth pad texture with long sustains. The Weeknd's signature dark harmony — minor key with lush 9ths.
Track 3: Lead — vocal-style melodic phrases: wide interval leaps, pentatonic minor with blue notes, long sustained notes with melismatic fills. Call-and-response phrasing — the "sung" quality without actual vocals.
At 68 BPM (default), this creates the contemporary R&B pocket — slow, atmospheric, dark. The i-VI-III-VII progression (same as synthwave but with extended chords and half the tempo) is the modern R&B harmonic language. Half-time drums + sub bass + dark 9ths = The Weeknd "After Hours" aesthetic.
bpm: Tempo (55-85, default 68 = modern R&B sweet spot). bars: Arrangement length (4-16, default 8). Must be multiple of 4. root: Root note (C minor = dark R&B key, common for The Weeknd). octave: MIDI octave for bass (2 = C2=36, sub bass register). unit_index: AU index with note tracks. drum_track / bass_track / chord_track / lead_track: Track indices.
Returns notes created per track and total.
Example: create_rnb_arrangement(bpm=68, root="C", bars=8) create_rnb_arrangement(bpm=75, root="Ab", bars=16)
Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| bpm | No | ||
| bars | No | ||
| root | No | C | |
| octave | No | ||
| velocity | No | ||
| bass_track | No | ||
| drum_track | No | ||
| lead_track | No | ||
| start_beat | No | ||
| unit_index | No | ||
| chord_track | No |
Output Schema
| Name | Required | Description | Default |
|---|---|---|---|
| result | Yes |