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Interface Overview

RESERVOIR’s interface is organized around four parameter cards surrounding a central isometric pillar visualizer, with a status bar along the bottom. 
┌─────────────────────────────────────────────────────────────────────┐
│  [MIDI Activity]                  RESERVOIR                         │
├──────────────┬──────────────────────────────┬───────────────────────┤
│              │                              │                       │
│   RHYTHM     │                              │   EXPRESSION          │
│   ENGINE     │                              │                       │
│              │     ISOMETRIC PILLAR VIZ     │                       │
│──────────────│       + ESN DRIFT CHART      │───────────────────────│
│              │                              │                       │
│ PERFORATION  │                              │  PITCH LOGIC          │
│              │                              │                       │
│              │                              │                       │
├──────────────┴──────────────────────────────┴───────────────────────┤
│  Layers: 8/12  |  Events: 234  |  Section: 1/4  |  [Generation On] │
└─────────────────────────────────────────────────────────────────────┘

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The Four Cards

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Left Column

  • Rhythm Engine (top left) — Controls when notes occur. Select from 17 rhythm techniques and adjust density, note length, and engine-specific parameters.
  • Perforation Engine (bottom left) — Controls which notes are removed. Select from 7 filtering strategies and adjust perforation amount and layer interaction.

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Right Column

  • Expression (top right) — Controls how notes are articulated. Velocity range, velocity curve shape, articulation style, CC controllers, and micro-timing.
  • Pitch Logic (bottom right) — Controls what notes play. Scale selection from 150+ scales, root note, octave span, and 11 pitch selection algorithms.

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Central Visualization

The central area shows the isometric pillar visualizer — each active layer is a pillar in a 3D landscape, with height and density mapped to the layer’s current activity. Above it sits the ESN drift chart: a 16-bar deviation plot of the Echo State Network’s internal state. The visualizer is GPU-accelerated and maintains a smooth frame rate even with hundreds of simultaneous events. See Visualization for details.

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Bottom Bar

  • Layer count — Active layers out of 12
  • Event count — Total MIDI events generated
  • Section indicator — Current section in the state sequence (when Auto-Evolve is on)
  • Generation toggle — Master on/off for MIDI generation
  • Export MIDI — Write generated MIDI to file

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Per-Layer MIDI Channels

Each of the 12 layers can be routed to its own MIDI channel (1–16), or all to a single channel. This lets you split layers across multiple instruments in your DAW with channel-based routing. In MPE Mode, layers automatically allocate channels for per-note pitch bend and expression, following the MPE specification.