overtone/overtone
Overtone
Overtone is a Lisp audio synthesis library that provides a programmable environment for designing synthesizers and generating real-time audio. It serves as a digital signal processing framework for live sound programming, integrating an audio sample manager for retrieving and caching sounds from remote repositories and a musical sequence generator for composing melodic and rhythmic structures.
The project distinguishes itself through its specialized interfaces for hardware and networking, featuring a dedicated system for routing MIDI data and exchanging Open Sound Control messages between software and external hardware. It also includes tools for algorithmic music composition, such as Euclidean rhythm generation and functions for defining scales and chords.
The framework covers a broad capability surface including digital audio signal processing with node-based routing and custom envelope design. It provides systems for audio event synchronization, timed sequencing, and the ability to coordinate audio output with graphics libraries and shader environments for audio-visual synchronization. Additional utilities include pitch and chord analysis and real-time monitoring of audio and control bus values.
Features
- Live Synthesis Controls - Offers a programmable Lisp environment for designing and modifying synthesizers in real time while audio is playing.
- Audio Synthesis Tools - Offers a programmable Lisp environment for designing custom synthesizers and generating real-time audio signals.
- Sound Synthesis - Provides a programmable environment for designing synthesizers and generating real-time audio.
- Algorithmic Music Composition - Generates rhythmic patterns, scales, and chords using mathematical models and music theory functions.
- Stream Event Synchronizers - Utilizes a global event stream to synchronize and distribute timing and control data across the musical system.
- Audio Digital Signal Processing - Provides a digital signal processing framework for building complex audio chains with oscillators and filters.
- Audio I/O Management - Provides a system for handling audio buffers, file playback, and MIDI communication to capture or trigger sounds.
- Global Timing Synchronization - Coordinates audio triggers and control changes using a unified stream to maintain timing across the system.
- Algorithmic Pattern Generators - Provides tools for creating musical sequences using mathematical algorithms such as Euclidean rhythms.
- MIDI Hardware Integration - Connects and routes signals from physical MIDI controllers to software synthesis parameters.
- MIDI and OSC Interfaces - Implements a dedicated system for routing MIDI data and exchanging Open Sound Control messages between software and hardware.
- OSC Message Exchanges - Exchanges Open Sound Control messages over a network to coordinate communication between software and hardware.
- Synthesis Buffer Processing - Handles real-time sound generation by manipulating audio buffers through oscillators, filters, and effects chains.
- Real-Time Audio Scripting - Allows modifying synthesizers, effects, and generators in real time without interrupting audio playback.
- Audio Node Trees - Organizes synthesis nodes into a tree structure to determine signal flow and execution order.
- Audio Sample Managers - Manages the retrieval and local organization of audio samples from remote web services.
- Complex Envelope Generators - Defines complex signal envelopes using various shapes and curve lists to control pitch and timbre.
- External MIDI Controller Mappings - Binds physical MIDI controller signals to specific internal synthesis parameters.
- Musical Sequence Generators - Includes a toolkit for composing melodic structures and rhythmic patterns using scales and arpeggiators.
- Parameter Modulation - Allows dynamic adjustment of synthesis model attributes using external control signals and bus values.
- Melodic and Rhythmic Composition - Enables the creation of melodic and rhythmic patterns using scales, chords, and swing-supported arpeggiators.
- Musical Event Synchronization - Manages timing and metronomes to coordinate live-programmed sequences and audio triggers.
- Music Theory Definitions - Ships a library of functions for defining the musical structures of scales, chords, and rhythms.
- Parameter Controls - Links control bus values directly to synthesis parameters for dynamic modulation of sound properties.
- Time-Based Event Scheduling - Provides a precise timing system and metronome for coordinating audio event sequences.
- Music Programming - Toolkit for designing synthesizers and collaborative music.
Star history
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