Strudel MCP Server

Instructions

Implementation Reference

• src/services/PatternGenerator.ts:68-81 (handler)

  Core handler function that generates Strudel bassline pattern code based on musical key and style, using predefined patterns with synth parameters.

  generateBassline(key: string, style: string): string {
    const patterns: Record<string, string> = {
      techno: `note("${key}2 ${key}2 ${key}2 ${key}2").s("sawtooth").cutoff(800)`,
      house: `note("${key}2 ~ ${key}2 ~").s("sine").gain(0.8)`,
      dnb: `note("${key}1 ~ ~ ${key}2 ~ ${key}1 ~ ~").s("square").cutoff(400)`,
      acid: `note("${key}2 ${key}3 ${key}2 ${this.theory.getNote(key, 3)}2").s("sawtooth").cutoff(sine.range(200, 2000).slow(4))`,
      dub: `note("${key}1 ~ ~ ~ ${key}1 ~ ${this.theory.getNote(key, 5)}1 ~").s("sine:2").room(0.5)`,
      funk: `note("${key}2 ${key}2 ~ ${this.theory.getNote(key, 5)}2 ~ ${key}2 ${this.theory.getNote(key, 7)}2 ~").s("square").cutoff(1200)`,
      jazz: `note("${key}2 ~ ${this.theory.getNote(key, 4)}2 ~ ${this.theory.getNote(key, 7)}2 ~").s("sine").gain(0.7)`,
      ambient: `note("${key}1").s("sine").attack(2).release(4).gain(0.6)`
    };
  
    return patterns[style] || patterns.techno;
  }

• src/server/EnhancedMCPServerFixed.ts:239-250 (registration)

  Tool registration in getTools(): defines name, description, and input schema for generate_bassline tool.

  {
    name: 'generate_bassline',
    description: 'Generate bassline',
    inputSchema: {
      type: 'object',
      properties: {
        key: { type: 'string', description: 'Musical key' },
        style: { type: 'string', description: 'Bass style' }
      },
      required: ['key', 'style']
    }
  },

• src/server/EnhancedMCPServerFixed.ts:805-812 (handler)

  Server-side tool handler: validates args, delegates to PatternGenerator, appends bassline to current pattern, writes it.

  case 'generate_bassline':
    InputValidator.validateRootNote(args.key);
    InputValidator.validateStringLength(args.style, 'style', 100, false);
    const bass = this.generator.generateBassline(args.key, args.style);
    const currentBass = await this.getCurrentPatternSafe();
    const newBassPattern = currentBass ? currentBass + '\n' + bass : bass;
    await this.writePatternSafe(newBassPattern);
    return `Generated ${args.style} bassline in ${args.key}`;

• src/server/EnhancedMCPServerFixed.ts:242-249 (schema)

  Input schema definition: requires 'key' (string) and 'style' (string) parameters.

  inputSchema: {
    type: 'object',
    properties: {
      key: { type: 'string', description: 'Musical key' },
      style: { type: 'string', description: 'Bass style' }
    },
    required: ['key', 'style']
  }