1. Hold the PlayStation Button
This is the button located between the analogue sticks in the lower half of the DualShock 4. Hold this down until you’re taken to a new menu.
2. Select Adjust Devices
At the top of the menu, select the ‘Adjust Devices’ icon using the X button on the DualShock 4. You’ll be taken to a second menu.
3. Lower the Volume
The top option in this new menu reads ‘Volume Control (Speaker for DualShock 4)’. Use the d-pad’s left or right buttons to raise or lower the volume. A chirp will play out of the DualShock 4 controller as you adjust it to help you to find the right setting. Move it all the way left to mute it completely, and all the way right to get the maximum volume.