If you don’t want to tinker with codecs, switch to a player with native EAC3 support:
Sometimes, the audio issue can be bypassed by switching the decoder type within the player.
This is the only method that maintains full hardware acceleration and smooth playback.
While the video is playing, tap the or SW icon at the top right. Try switching to HW+ Decoder .
MX Player often detects newly downloaded codecs automatically upon launch. If it doesn't, follow these manual steps: