The record
In a post dated February 7, 2024, a user says they set up a new Apple Vision Pro and updated it to visionOS 1.0.2 before trying any media. Sound worked during setup, but afterward Siri, Apple Music, and Apple TV produced no audio, and Siri’s replies showed up only as text. They tried adjusting the volume and asking Siri to mute and unmute, and noted that no Bluetooth devices were connected. This is an individual early-adopter report.
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A documented user report, not an independently reproduced test or an estimate of how often the problem occurs.