Core Features

🎵 Contract-Based Composing

Define a musical contract and generate within those constraints:

• Set key, chords, BPM, and bars to establish the musical framework
• Gemini generates MIDI that respects the contract
• Lyria generates audio for texture and atmosphere
• All tracks in a scene share the same contract for coherent compositions

🎛️ Dual-Deck Performance Workflow

Built around the core concept of private preview and public performance:

• Composition Deck - Generate and preview clips in headphones
• Performance Deck - Play approved clips for your audience

🧩 Extensible Plugin SDK

All built-in generators and tools run on the Plugin SDK:

• Synth Generator - MIDI generation with Gemini, played through Surge XT or any VST3/AU instrument
• Drum Generator - Drum-pattern MIDI generation with a built-in sample-based drum sampler
• Instrument Generator - MIDI generation for pitched, polyphonic sample-based instruments
• Loops - Sample / loop library browser with FX chains and time-stretching
• Stems - Audio-from-text generation with Lyria, with optional stem splitting
• Chat - Conversational assistant that builds and edits your scene from natural-language prompts
• Recorder - Loop-aware microphone recording (opt-in)

Upcoming plugin integrations: Splice, ElevenLabs, live coding, and agentic prompting.

🎧 Audio Routing Modes

Hardware-level support for headphone/main output separation:

• Solo Mode - Single output for practice and production
• Performance Mode - Separate Cue (headphones) and Master (PA/speakers) outputs

View Audio Routing Documentation →

🎹 Instrument Support

• Surge XT ships as the default synth with bundled presets
• Any VST3/AU instrument can be loaded per track via the instrument selector
• The synth generator picks appropriate Surge XT patches based on sound descriptions
• Custom instruments preserve their state across scenes and project save/load

🔄 Scene-Based Composition

Organize your performance into scenes:

• Group tracks into logical units
• Clone scenes between decks
• Build setlists for live performance