Dolby Atmos on streaming will finally sound as good as 4K Blu-ray, based on these blind test results of audio engineers — but this still won’t cause collectors to switch from physical media

Dolby screening room in London .

• Dolby AC-4 was the preferred codec of multiple audio pros
• Better than existing Atmos audio without high bandwidth requirements
• Peacock is upgrading but other streamers haven't announced any plans

One of the biggest differences between streamed movies and 4K Blu-ray is the sound quality: even the most expensive streaming tiers deliver compressed audio with a clear reduction in dynamic range and clarity compared to disc-based playback.