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mcp_opendaw_create_dubstep_arrangement

Create a full dubstep arrangement with half-time drums, wobble bass, and lead arpeggio across three tracks. Specify tempo, key, and bar count for automatic MIDI generation.

Instructions

Create a full dubstep arrangement — half-time drums + wobble bass + lead arp across 3 tracks.

Dubstep with all elements locked in half-time feel:

  • Track 0: Drums — half-time at 140 BPM (feels like 70): kick on 1, snare on 3, with percussive fills and ghost notes. The signature dubstep swing.

  • Track 1: Bass — wobble bass: sustained sub notes with rhythmic pitch shifts between root and octave/fifth, creating the "wub-wub" that defines the genre. Cutoff-sweep style pitch modulation via note offsets.

  • Track 2: Lead — minor arpeggio that runs through the arrangement, atmospheric and dark, complementing the wobble bass.

At 140 BPM (default), half-time means the groove feels at 70 BPM — kick on beat 1, snare on beat 3 of each bar. This is the fundamental difference from all other electronic arrangements: the half-time feel creates the heavy, swinging groove.

bpm: Tempo (135-150, default 140 = classic dubstep). bars: Arrangement length (4-16, default 8). root: Root note (G is a classic dubstep key). octave: MIDI octave for wobble bass (1 = C1=24, sub-bass territory). unit_index: AU index with note tracks. drum_track / bass_track / lead_track: Track indices.

Returns notes created per track and total.

Example: create_dubstep_arrangement(bpm=140, root="G", bars=8) create_dubstep_arrangement(bpm=145, root="F", bars=16)

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
bpmNo
barsNo
rootNoG
octaveNo
velocityNo
bass_trackNo
drum_trackNo
lead_trackNo
start_beatNo
unit_indexNo

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior2/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are present, so the description carries the burden. It does state the output ('Returns notes created per track and total') and notes that 'unit_index' should be an AU with note tracks, but it does not disclose whether the tool overwrites existing notes, creates tracks, requires specific project setup, or has other side effects. This is a significant gap for a mutation tool.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is structured with a clear summary, track-specific details, a half-time explanation, parameter list, and examples. It is somewhat long but front-loaded and each section adds value; the half-time explanation is slightly redundant.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

With 10 parameters, no annotations, and 0% schema coverage, the description covers most parameters, provides default values, and includes example calls. It still lacks descriptions for velocity and start_beat and omits side-effect behavior, but overall it is sufficiently informative for basic invocation.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0%, but the description compensates by explaining bpm, bars, root, octave, unit_index, and the three track parameters, including defaults and ranges. However, velocity and start_beat are not described, leaving two parameters unresolved.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The opening sentence clearly states the tool creates a full dubstep arrangement with half-time drums, wobble bass, and lead arp across 3 tracks. This is a specific verb+resource and distinguishes it from sibling genre tools by naming dubstep-specific elements.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description implies use for dubstep tracks at 140 BPM and highlights the half-time feel as 'the fundamental difference from all other electronic arrangements.' However, it doesn't explicitly state when to choose this over other genre arrangement tools or provide clear exclusions.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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