SET L="*_dolby-AudioStream-1-ChannelCount-6-Channel-1_-23_LUFS.wav"
SET R="*_dolby-AudioStream-1-ChannelCount-6-Channel-2_-23_LUFS.wav"
SET C="*_dolby-AudioStream-1-ChannelCount-6-Channel-3_-23_LUFS.wav"
SET Lfe="*_dolby-AudioStream-1-ChannelCount-6-Channel-4_-23_LUFS.wav"
SET Ls="*_dolby-AudioStream-1-ChannelCount-6-Channel-5_-23_LUFS.wav"
SET Rs="*_dolby-AudioStream-1-ChannelCount-6-Channel-6_-23_LUFS.wav"
for %%a in (%L%) do for %%b in (%R%) do for %%c in (%C%) do for %%d in (%Lfe%) do for %%e in (%Ls%) do for %%f in (%Rs%) do (
"D:\comp\disk_D\programs\ffmpeg\ffmpeg-4.1-win64-static\bin\ffmpeg.exe" -i %%a -i %%b -i %%c -i %%d -i %%e -i %%f -filter_complex "[0:a][1:a][2:a][3:a][4:a][5:a]amerge=inputs=6[aout]" -map "[aout]" -c:a ac3 -b:a 448k -ar 48000 "%%~na.ac3"
)