Electric piano

A tine electric piano. A key strikes a tine and a pickup hears it ring: a body on the same pitch, which barks when the key is struck hard, and a bell fourteen times up, which pings and is gone in a tenth of a second. The note rings down by itself, longer in the bass, through a pickup that can be driven and a tremolo. Start from one of its four presets (Warm, Bell, Bark, Mellow), then shape it. It is a device: a state, a panel, an engine and tools, each its own file.

Installation

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pnpm dlx shadcn@latest add @audio-ui/electric-piano

Controls

Every control reads 0 to 10, as a panel's knobs do, and shows the value it sets in the unit the sound takes.

Panel

The panel loads a preset from the menu in its title bar, lays the controls out by what they do (tone, pickup, tremolo, output) and has a keyboard of two octaves that plays the piano. electricPianoPreset(name) gives a preset's whole state, and ELECTRIC_PIANO_PRESETS lists them. With activeNotes, the notes held now, such as on a MIDI keyboard, light up their keys. The panel sends notes out and does not make the sound, so it plays through any engine.

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import { ElectricPianoPanel } from "@/components/audio-ui/devices/electric-piano/panel";
import { electricPianoDevice } from "@/components/audio-ui/devices/electric-piano/device";

const [state, setState] = useState(() => electricPianoDevice.defaults());

<ElectricPianoPanel onValueChange={setState} value={state} />;

Engine

Create it, connect it and update it as for any device: see The engine.

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engine.noteOn({ frequency: 261.63, velocity: 0.9 }); // strikes a key
engine.noteOff(); // lets it go: it falls silent in a fifth of a second

// Scheduled ahead on the audio clock, by a host that plays notes from a song:
engine.noteOn({ frequency: 440 }, { at: time, id: "a4" });
engine.noteOff({ at: time + length, id: "a4" });

An engine plays one voice. For chords, make as many as the notes you hold and give each note its own: the arrangement's engine does it for a MIDI track, and the block above keeps ten. A note rises in three milliseconds and rings down by itself, even held; its bark and its bell are as bright as the key is hard. Let go, it falls silent from where it got to. A key struck again while its note rings cuts it and strikes anew. A note already ringing keeps the timbre it was struck with, while the drive, the tremolo and the volume move under it. An agent plays the piano with the play tool.