Tap the (three lines or three dots) in the top corner. Go to Help > About .
I held my breath.
Because Dolby requires licensing fees to utilize their proprietary technology, open-source and free media players often cannot include the decoders natively. To avoid legal and financial complications, MX Player removed native support for DTS, DTS-HD, AC3, EAC3, and MLP audio codecs from its official Play Store releases. How Custom Codecs Solve the Problem
: Custom codecs are often tailored to specific CPU architectures—such as ARMv8 NEON
: EAC3 outputs up to 7.1 discrete audio channels , providing clear spatial audio mapping for home theater setups and headphones.
Relaunch . The app often auto-detects new codec files in your Downloads folder and prompts you with a pop-up: "Found custom codec. Use it as custom codec?" Click OK . The app will automatically restart. If it doesn't auto-detect: Go back to Settings > Decoder . Tap on Custom Codec .
Open MX Player. It may automatically detect the file and prompt you to click to restart. If no prompt appears, navigate to Settings > Decoder > Custom codec , locate the downloaded file, and select it. Restart & Verify : The app will restart. Confirm success under Help > About to see if the custom codec is loaded. Version Comparison Codec Version Best Use Case
Open MX Player > Settings > Decoder. Scroll to "Custom codec." If a file path is shown, tap it and select "Clear." Restart the app.