Hello,
I am having a persistent audio issue with my PiCar‑X. After completing all the recommended steps, I can confirm that the problem is not related to software, configuration, or the Raspberry Pi itself. The DAC is detected and working, but the amplifier stage of the Robot HAT appears to be defective.
I would appreciate your assistance so I can continue working with my Picar‑X.
Thank you for your support.
Execute the alsamixer command, press F6 to switch between sound card devices, use the ↑ and ↓ arrow keys to adjust the volume, then press ESC to exit. After that, check if the speaker volume can be increased.
Next, reinstall i2samp.sh:
cd ~/pidog
sudo bash i2samp.sh
Afterwards, run the sound example to see if it works properly
I have followed all the instructions exactly as requested.
I ran the alsamixer command, pressed F6, selected snd_rpi_hifiberry_dac, and set all playback channels to 100%. Everything is unmuted and correctly configured.
I reinstalled the audio driver using the correct script:
cd ~/robot-hat
sudo bash i2samp.sh
The script completed successfully, updated the overlays, configured /etc/asound.conf, set the mixer levels, and confirmed that the sound card index is 2 (sndrpihifiberry).
After the installation, I rebooted the Raspberry Pi and ran the sound test again.
The script’s built‑in speaker test runs without any ALSA errors. It initializes the DAC, sets the buffer and period sizes, and plays the “Front Left / Front Right” test tones internally.
However, there is still absolutely no sound output from the speaker.
I am ready to provide photos or screenshots of every step if needed. Thanks
Please contact sevice@sunfounder.com to get a robot hat.
Thank you for your assistance
