Z:gnu-www-ja-why-audio-format-matters--7657a0-Luckily, you don't have to req/en

Luckily, you don't have to require such users to engage in civil disobedience every time they want to listen to your works. By offering Ogg Vorbis, you ensure that no listeners have to get involved with a patented distribution format unless they choose to, and that your audio works will never be hampered by unforseen licensing requirements. Eventually, the growing acceptance of Ogg Vorbis as a standard, coupled with increasingly unpredictable behavior by some of the MP3 patent holders, may make it impractical to offer MP3 files at all. But even before that day comes, Ogg Vorbis remains the only portable, royalty-free audio format on the Internet, and it's worth a little extra effort to support.