How to convert iTunes videos with 5.1 audio track (AC3 Audio Track) preserved?

Enjoying iTunes videos with 5.1 audio or AC3 audio track at your home cinema will be a really fantastic experience. However, iTunes videos are protected by DRM and it causes one problem, that is, these iTunes videos can't be played on other devices except for Apple devices. Even though there are some iTunes movie removal software on the market that can help strip DRM and convert to DRM-free videos, but until now, none of them could keep the AC3 audio track after conversion. This puzzles a lot. How to remove the DRM to get the unprotected videos while keeping the original 5.1 surrounding audio? Any solution?
M4Vgear DRM Media Converter is the fastest DRM remover in the world which can remove DRM from iTunes videos at 20X faster speed and at the same time, keep 5.1 audio of iTunes videos. After converting with M4VGear, you will get DRM-free iTunes videos with 5.1 audio and lossless quality. Let us see how to keep 5.1 audio when removing DRM from iTunes videos below.

Things you will need before removing DRM

Program: M4VGear DRM Media Converter
System Requirements:
iTunes: the latest version

Operating system:
Mac OS X 10.8 & 10.9 & 10.10
Windows XP, Vista, 7, 8 (32-bit & 64-bit)

Steps for Removing DRM from iTunes Videos

1: Launch M4VGear and iTunes will be opened automatically.
2: Click "Add" button on the upper left to choose iTunes videos from iTunes library and then click "OK" to apply.

3: Click the Setting button of the loaded video to choose audio track you want to save. You can choose to save All Audio that includes stereo and 5.1 audio or only 5.1 audio.

4: Click "Convert Now" button on the bottom right to start removing DRM from iTunes videos. After the conversion is finished, open output directory to find the DRM-free MP4 videos with 5.1 audio in MP4 format. Now you can stream these videos with 5.1 audio with Apple TV or play them on Windows Media Player.

Dolby Digital, AC3 Audio and 5.1 Audio

Dolby Digital, or AC3 Audio is the common version of Dolby Digital technology containing up to six discrete channels of sound. The most elaborate mode in common use involves five channels for normal-range speakers (20 Hz – 20,000 Hz) (right, center, left, right surround, left surround) and one channel (20 Hz – 120 Hz allotted audio) for the subwoofer driven low-frequency effects. Mono and stereo modes are also supported.

The above mentioned five full bandwidth channels and one low-frequency effects channel (the "point one") make up 5.1 audio, which is the most popular audio system in commercial cinemas and home theaters. Dolby Digital, SDDS, DTS, and Pro Logic II all use 5.1 audio system. Besides, 5.1 is also the standard surround sound audio component of digital broadcast and music.