Buzzer

The PS5's chassis piezo buzzer is exposed as a kernel driver, driven over ICC (same indicator service used by the LED). Merged in ps5-linux-patches #12.

Sysfs interface

/sys/class/misc/ps5_buzzer/beep

Write a level, 0-3:

Value	Meaning
0	Silent
1	Short beep
2	Error beep
3	Long beep

echo 1 | sudo tee /sys/class/misc/ps5_buzzer/beep   # short
echo 2 | sudo tee /sys/class/misc/ps5_buzzer/beep   # error
echo 3 | sudo tee /sys/class/misc/ps5_buzzer/beep   # long

There's also a stop attribute that cancels a pattern started through the driver's ioctl-based pattern player (/dev/ps5_buzzer, PS5_BUZZER_PLAY) - not needed for the basic beep levels above.

echo 1 | sudo tee /sys/class/misc/ps5_buzzer/stop

ps5ctl

ps5ctl exposes the three beep levels by name:

sudo ps5ctl --buzz --list      # Short, Error, Long
sudo ps5ctl --buzz Short

or via the Buzzer tab in sudo ps5ctl.