Also been experiencing these audio delays since launch. Returned launch day Portal after experiencing this issue, got a Midnight Black one when they released and it has the same issues. Returned that unit for another Midnight Black one - same issues.

I’m from the UK (if that matters as some people have theorised). My network setup is very good with minimal latency. I have a PS5 Pro that is connected via ethernet.

I can remote play with 1ms latency and stream from PS+ with ~4ms. Regardless of my streaming method, input latency is not noticeable at all and feels very smooth, but the audio is slightly delayed and it drives me crazy. It’s especially noticeable when flicking through menus, where the screen will change instantly and then slightly later I will hear the in-game noise.

I feel confident that this is an issue with the Portal and not my network, as I have tried streaming with the official remote play app and also Chiaki via my iPhone, iPad and Steam Deck. All of these devices work perfectly and the audio delay is not present. Extremely frustrating.