After further testing, and hooking the Raspberry Pi straight into my beamer, audio works perfect. (through the beamer speaker)
Please check the LE audio settings in expert mode. The 44.1kHz sampling rate is common, but could be too low for some hi-res audio codecs. So your beamer seems to handle that sampling rate, but the Meridian AVR could have a problem with it.
Code
2026-04-18 13:59:22.897 T:1906250624 DEBUG: CActiveAESink::OpenSink - SinkPi Initialized:
2026-04-18 13:59:22.897 T:1906250624 DEBUG: Output Device : HDMI
2026-04-18 13:59:22.898 T:1906250624 DEBUG: Sample Rate : 44100
2026-04-18 13:59:22.898 T:1906250624 DEBUG: Sample Format : AE_FMT_FLOAT
2026-04-18 13:59:22.898 T:1906250624 DEBUG: Channel Count : 2
2026-04-18 13:59:22.898 T:1906250624 DEBUG: Channel Layout: FL, FR
2026-04-18 13:59:22.898 T:1906250624 DEBUG: Frames : 2205
2026-04-18 13:59:22.898 T:1906250624 DEBUG: Frame Size : 8
chewitt : Thx for explaining.