So you would like to take your gaming and streaming to the next level? The Nyko Sound Pad can help. It comes with programmable buttons for easy control of sound effects. It attaches to the bottom of the DualShock 4 controller through the 3.5mm port.
The Sound Pad has a rechargeable battery and dedicated power button and volume control. You get 11 buttons for your sound effects. Costs under $25 at this time.