When you're streaming lossless or high-res audio from services like Apple Music, Tidal, or others, many of them enforce HDCP requirements when outputting through HDMI, especially when the stream is tied to video or has DRM-enforced playback conditions. The front HDMI port on your Pioneer VSX-1131 not supporting HDCP is almost certainly the root of the issue. When your MacBook negotiates the HDMI connection through the adapter, and finds that the receiving end doesn't support HDCP, it blocks playback of any protected streams — which can include lossless or high-resolution content, even audio-only, depending on the service.
Potential workaround could be:
- Switch to a rear HDMI input. Your Pioneer model's read HDMI ports does support HDCP 2.2.
- Use AirPlay to stream to the receiver instead. Your receiver supports this as well..
- Try audio-only output via USB or a separate DAC, bypassing HDMI altogether. The M1 MacBooks support USB audio natively, and sending PCM over USB to a dedicated DAC or even to the receiver.