To ensure the best audio quality, MX Player provides several technical adjustments: MX Video Player HD - App Store - Apple
Open the video and tap the or the three-dot menu. hindi audio track for mx player
If your video file only has English but you have a separate Hindi audio file, MX Player allows you to "link" them: Open External Audio : Pause the video and tap the three-dot menu Audio Menu Audio > Open Find Your File To ensure the best audio quality, MX Player