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Fusion HAT+ Speaker

Introduction

The Fusion HAT+ includes a built-in speaker, making it ideal for voice prompts, alarms, and other AI/IoT audio applications. This lesson shows you how to enable, test, and use the speaker with text-to-speech.

Note

This guide assumes Raspberry Pi OS is installed and the Fusion HAT+ drivers are properly set up.

../_images/fusionhat_speaker.png

Speaker Setup

1. Check if the Speaker Is Recognized

Run the following command:

aplay -l

You should see a sound device similar to:

card 0: sndrpigooglevoi [... voicehat-hifi-0 ...]

If a device appears under card 0 or another card number, the Fusion HAT+ audio hardware is detected.

2. Testing the Speaker

  1. Play a stereo test sound:

    speaker-test -t wav -c 2

    You should hear “Front Left / Front Right”. Press Ctrl+C to stop.

Troubleshooting

  • No sound output

    • Check audio volume with:

      alsamixer

    • Confirm your Pi sees the audio device:

      aplay -l

  • Speaker not recognized

    • Reseat the Fusion HAT+

    • Reboot the Raspberry Pi

    • Ensure drivers are installed

    • Or rerun:

    sudo /opt/setup_fusion_hat_audio.sh