# Keys

> A headless piano keyboard that plays with pointer glissando, touch and the keyboard, reports presses with velocity, and can show notes held elsewhere (MIDI input or playback) without re-rendering.

- Author: [addstack](https://21st.dev/@addstack)
- Library: addstack
- License: MIT
- Tags: Keyboard, Audio
- Live preview: https://21st.dev/@addstack/components/keys

## Install

```bash
npx shadcn@latest add "https://21st.dev/r/addstack/keys?api_key=$API_KEY_21ST"
```

Requires a 21st API key (generate one at https://21st.dev/mcp) passed as `API_KEY_21ST`. Free accounts get a limited number of installs per day; unlimited on a paid plan — see https://21st.dev/pricing.

Full component directory: https://21st.dev/llms.txt · More like this: https://21st.dev/community/components/s/keyboard.md