FLAC 1.0

[Selur]

Okay this is the call used by Hybrid:

-> HelperCall: "C:\Program Files\Hybrid\64bit\ffmpeg.exe" -y -threads 8 -nostdin -i "D:\Graveyard Of Honor 1975 1080p GBR Blu-ray AVC DTS-HD MA 1.0-PzD\audio_aid_4352_iid_5.dts" -ac 1 -ar 48000 -sample_fmt s32 -f sox -
-> Helper2Call: "C:\Program Files\Hybrid\64bit\sox.exe" --multi-threaded  --temp "C:\Users\Юрий\AppData\Local\Temp\2021-01-21@16_37_44_431000" --buffer 524288 -S -t sox - --endian little -b 24 -t wav - remix 1 1
-> MainCall: "C:\Program Files\Hybrid\64bit\flac.exe" -f -F --ignore-chunk-sizes -8 -o "D:\Graveyard Of Honor 1975 1080p GBR Blu-ray AVC DTS-HD MA 1.0-PzD\iId_8_aid_0_2021-01-21@16_37_44_431000.flac" -

I see what happen, Hybrid even reports: 'enforcing toStereo upmix for dts mono audio,...'

What happens if you call:

"C:\Program Files\Hybrid\64bit\ffmpeg.exe" -y -threads 8 -nostdin -i "D:\Graveyard Of Honor 1975 1080p GBR Blu-ray AVC DTS-HD MA 1.0-PzD\audio_aid_4352_iid_5.dts" -ac 1 -ar 48000 -sample_fmt s32 -f sox - | "C:\Program Files\Hybrid\64bit\sox.exe" --multi-threaded  --temp "C:\Users\Юрий\AppData\Local\Temp\2021-01-21@16_37_44_431000" --buffer 524288 -S -t sox - --endian little -b 24 -t wav - | "C:\Program Files\Hybrid\64bit\flac.exe" -f -F --ignore-chunk-sizes -8 -o "D:\Graveyard Of Honor 1975 1080p GBR Blu-ray AVC DTS-HD MA 1.0-PzD\iId_8_aid_0_2021-01-21@16_37_44_431000.flac" -

(I remoxed the upmix)
inside a Windows Command prompt?

Cu Selur