HandBrake version (e.g., 1.0.0): 1.2.2 (2019022300)
Operating system and version (e.g., Ubuntu 16.04 LTS, macOS 10.13 High Sierra, Windows 10 Creators Update): Win10-1803
I'm making MKVs and I think MKV supports LPCM. This is important because I have a homemade home theater that employs a downstream HDMI Audio Extractor with 6 RCA jacks to feed 2, 4-channel amps. The Extractor only decodes LPCM audio. Since HB currently can't encode LPCM, playing an MKV results in FL + FR only (via the TV's speakers). Since there's no C channel on the TV, actors in the center-front make no sounds at all. Also, movies that contain 5.1 (or 7.1) LPCM don't pass through because HB replaces the LPCM with AC3 (which the Extractor can't decode).