No. The codec is a reverse-engineered or redistributed open-source component. While Dolby holds patents on EAC3, using the codec for personal playback is generally considered fair use/end-user circumvention. Distributing encoded content commercially is illegal. You are safe at home.

The most reliable way to fix this is by using the ZIP file, which includes all necessary architectures. How to Fix The No Audio Issues on MX Player | Guiding Tech

: Get the AIO (All-in-One) ZIP pack from a trusted source like Free-Codecs or Codecs.com to ensure you have the right version (e.g., v1.90.1 for 2026 versions).

If you are seeing the error message while using MX Player, you aren't alone. This common issue typically results in a video playing perfectly while remaining completely silent. Why Does This Happen?

EAC3 (Enhanced AC-3) audio format is not supported natively in MX Player due to licensing restrictions with Dolby and DTS. This results in videos playing with no sound and a "This audio format (EAC3) is not supported" error message.