Buzzer

The PS5's built-in piezo buzzer has a kernel driver that talks to it over the ICC (the same indicator service the LED uses). Merged in ps5-linux-patches #12.

Sysfs interface

/sys/class/misc/ps5_buzzer/beep

Write a level from 0 to 3:

Value	Sound
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 is also a stop attribute. It cancels a pattern started through the driver's ioctl-based pattern player (/dev/ps5_buzzer, PS5_BUZZER_PLAY). You don't need it for the basic beeps 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 use the Buzzer tab in sudo ps5ctl.