Beep.js

One line of code like `synth = new Beep.Instrument()` creates a playable synthesizer with DOM elements and event listeners, enabling rapid prototyping.

Supports MIDI controller keyboards via the Web MIDI API in Chrome, allowing real-time input from external devices with minimal setup.

Notes can be defined with properties like frequency, MIDI number, and octave, and support tunings such as just intonation and equal temperament through the Note class.

Allows deep customization of voices through oscillator types and gain settings, as shown in the Trigger section with examples of multiple voices per note.

Includes score composition and playback capabilities using arrays of delays, trigger IDs, and durations, enabling melody and harmony creation without external tools.