Audio tracks and subtitles
Updated
Pick a track while watching
Open the gear menu in the player (on Apple TV, use the Audio and Subtitles pills):
- Audio lists the available audio tracks.
- Subtitles lists subtitle tracks, plus Off.
Your choice is remembered for that movie or show — pick Japanese audio on one episode and the whole series keeps it.
Default languages
Set global defaults in Settings → Player → Default Languages, with separate pickers for Audio and Subtitles. They apply when playback starts; a per-title choice made in the player always overrides them. The subtitle default can also be Off to never auto-enable subtitles.
Subtitle appearance
Settings → Player → Subtitles styles text subtitles (SRT, VTT):
- Font — including the accessibility-focused Atkinson Hyperlegible and OpenDyslexic.
- Size — seven steps from Tiny to Very Large.
- Color, Background (outline, shadow, semi-transparent, opaque), and Bold.
ASS/SSA subtitles keep their own built-in styling by design.
External subtitle files
For Plex, Jellyfin, Emby, SMB, and WebDAV content, Dion automatically discovers sidecar subtitle files next to your video — SRT, VTT, ASS/SSA, SMI, MicroDVD/SubViewer, and VobSub pairs — and offers them in the Subtitles menu like any other track.
Fine-tuning sync
On iPhone and iPad, the gear menu's Advanced sheet adjusts Audio Delay and Subtitle Delay in 50 ms steps (up to ±1 second) when a track is slightly out of sync. Subtitle delay adjustment is part of Dion Pro.