Y exactamente ¿que estas haciendo?, o lo que es lo mismo, detalla que opciones estas usando y eligiendo. Porque al parecer no estas definiendo el pass-through e en la decodificacion del audio DD [DD, DD+ y DD-TrueHD], solo para el DTS [dts, dts ex, dts-hdma], o que las bocinas las tienes configuradas [en potplayer] en estereo como explican en el siguiente post de videohelp.
-->forum.videohelp.com/threads/375411-How-to-setup-Daum-PotPlayer-to-output-TrueHD-and-DTS-HD
F5 > Click on + next to Filter Control > Click on Audio Decoder > [On lower center] Click on Button that says: Built-in Audio Codec/Pass-through Settings >
On the right, under Pass-through (S/PDIF, HDMI) > SELECT: Default Pass-through Muxer for each option [AC3, EAC3, TRUEHD, DTS, DTS-HD...] > OK > OK.
This additional step is actually necessary:
F5 > Click on Audio > [on the right] Speakers > Select your Speakers [do not select not "Same as input" for speakers because outside "input" may not be the same as your number of speakers!] >
[below Speakers there is the option for] Output >
Pass-through after AC-3 re-encoding
or
Pass-through after DTS re-encoding
*Warning*: Remember to set Pass-through to DISABLE after you finish (and select 2.0 Speakers) again, or else audio on some files will not work so I would not set this permanently, only temporarily to watch a file with High Definition Audio.