---
name: audio
description: Audio on the Arduino Uno Q — microphone capture and audio output via ALSA on the Linux side, plus speech (whisper/vosk/espeak). Load this for recording sound, playing audio, or speech-to-text / text-to-speech on the board.
---

# Audio on the Uno Q (Linux side)

Audio endpoints (mic, headphone/line-out via JMISC) are **Linux/MPU** devices,
driven through **ALSA**. Sketches on the MCU do not handle audio.

## Record / play (ALSA)

```sh
arecord -d 5 -f cd /tmp/clip.wav          # record 5s
aplay /tmp/clip.wav                        # play
arecord -l                                 # list capture devices
```

## Speech (Python, MPU)

- **STT:** `whisper` (or `vosk` for a lighter offline model).
- **TTS:** `espeak` / `espeak-ng` (offline, no key).

```sh
espeak-ng "Sketch flashed."
```

## Pitfalls

- No Arduino audio libraries — audio is a Linux-side capability.
- Keep models small; the MPU is also hosting the LLM (~1.1 GB RSS) on the 4 GB SKU.