Listen carefully: Both DVD-A and SACD promise you-are-there sound quality. Both require new discs and players. SACD can be listened to in 2-channel stereo, or in 5.1 surround sound; DVD-A can only be listened to in 5.1 surround, but offers video clips and images you can view on your PC or TV. In 5.1 surround mode, there's not a lot of difference between the two formats to the untrained ear. The problem is that not every audiophile likes 5.1 surround sound -- some believe 2-channel is closer to what a live performance sounds like. In that case, your only option is SACD.
Will SACD and DVD-A discs work in your player? Some SACD discs will only play in a SACD player, though the majority are hybrids that function in regular CD and DVD players. DVD-A discs will play in any DVD player, but unless your DVD machine is built for DVD-A, any benefits over ordinary CDs are lost. Expect hybrid DVD-A discs for CD players within the next year. Confused? Buy a universal player that reads all formats. Pioneer and others say they'll have universal players for around $200 this year.
Stay up to date on the latest news of the future of science and technology from your iPhone with full articles, images and offline viewing
Featuring every article from the magazine and website, plus links from around the Web. Also see our PopSci DIY feed
Share links with friends, comment on stories and more
In our December issue, Popular Science names the 100 best innovations of the year: bombproof wallpaper, self-parking cars, the fastest helicopter, and 97 more. Plus inventor profiles and videos.
Check out the best of what's new here.