EchoSplit, HDMI Splitter with Downscaling — Sewell Direct
4k Hdmi Converter Up/down Scaler 720p 1080p For Video Wall Combine With 1 Splitter And 4 Converters Support Five Splicing Modes - Audio & Video Cables - AliExpress
EARC Audio Extractor 4K@60Hz, Downmixing L/R HDMI
WyreStorm Express™ EXP-CON-4K-DD HDMI video upscaler/downscaler with audio downmixing at Crutchfield
XOLORspace 61181 1x8 1 in 8 out 4K 60HZ HDR HDMI Splitter with downsca