I can't seem to get my hands on the Gold Headset Companion app for my PS3. The (Dutch) store says it's only for the PS4 and I'm pretty sure that's not right. :
How to use the PlayStation Gold Companion App with your headphones | Android Central
PlayStation Europe on Twitter: "Experience #GodofWar as it was meant to be heard with the new custom audio mode created by @SonySantaMonica. Download from the PS4 Headset Companion App for the Platinum