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SPEC.md - Rausch (Textural Noise Generator)

1. Project Concept

Rausch is a boutique textural noise generator designed for lo-fi, techno, and ambient production. It moves beyond standard white/pink noise by using processed organic, cosmic, and industrial recordings as a sound source.

2. Target Audience

  • US/EU Boutique Market: High-end lo-fi producers, techno artists, and sound designers.
  • Value Prop: "Boutique noise for professional texture."

3. Core Engine (HISE)

  • Sound Source: 12-15 high-quality, loopable Public Domain/CC0 textures (NASA, Industrial, Nature).
  • Movement Engine: Slow LFO modulation (random/sine) on Sample Start and Pan to prevent loop fatigue.

4. Signal Chain & FX (The "Sinuslabs" Vibe)

Since we have access to Airwindows and Faust, we will focus on subtractive grit and spatial aging.

FX Chain Idea:

  1. Input: Sampler Engine (12 curated textures).
  2. DATA DECAY (Airwindows - HipCrush):
    • Low Crush: Targeting sub-harmonics and "thump" (Industrial/Factory focus).
    • Mid Crush: Targeting core texture and "shmoo" (Archive/Tape focus).
    • High Crush: Targeting "top-end shizzle" and digital artifacts (Cosmos/Vinyl focus).
  3. MOVEMENT (HISE LFO): Dual-stage LFO on Filter Cutoff and Volume to ensure organic evolution.
  4. TILT (Faust): Simple Tilt EQ for quick tone balance (Dark ↔ Bright).
  5. SPACE (Faust): Virtual Distance/Reverb to place noise in a physical context.

5. UI/UX Design

  • Color Palette: Signal Orange (#ff3e00) vs. Deep Slate Gray.
  • Main Interaction: One big "TEXTURE" selector knob and a "WEAR" (Airwindows Saturation) slider.
  • Visuals: Waveform visualization using WaveSurfer-style HISE components.

6. Scope (The "2-Day Build")

  • Day 1: Load textures, setup sampler, wire up Airwindows integration.
  • Day 2: Build UI, map Tilt EQ and Wear slider, export installers.

7. Licensing

  • Code: GPLv3.
  • Product: Paid Commercial Binaries (Boutique positioning).