DIRECTV HR21P System Manual - Page 39
What is 5.1 Audio?
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My Playlist This option displays a submenu that lists recorded programs, and also gives you access to the Playlist screen, where you can view and edit the list of recorded programs and see DIRECTV Showcases of special programming. (See "The Playlist" on Page 22) Audio Options What is 5.1 Audio? Some programs have alternate audio available (such as other language tracks or Dolby Digital). This option only appears in the Menu over Live TV when the current program has alternate audio. You can set the default so that whenever a program has alternate audio available, it automatically plays this audio, or you can change the alternate audio temporarily for the program you are watching. In either case, press MENU while in Live TV, then: It's 5 channels of audio for theaterstyle sound, plus a subwoofer for heart-pounding bass. To change the default audio, from the Menu, select Settings, select Setup, then select Audio in the left menu and follow the onscreen instructions. To temporarily change the audio, from the Menu, select Audio Options, then select the audio track you prefer. Once the program is over or you change the channel, the audio will change back to the default setting. Dolby® Digital The recommended audio format for HDTV is Dolby* Digital. Go ahead. Try this at home. Your DIRECTV HD DVR PRO is capable of reproducing 5.1-encoded audio: five discrete channels of full-range digital audio, plus one channel of low-frequency (subwoofer) audio, for use by A/V receivers capable of decoding the 5.1-channel signal. The audio signals are broken into left-front, center, right- 29