M-Audio Revolution 5.1 User Manual page 26

If you're playing (and decoding) a 5.1 surround DVD and you only have two
speakers connected, select "TruSurround XT."
If you're playing a stereo MP3, CD, or DVD and want to hear it through multiple
surround channels, select "Circle Surround II."
If you're playing a stereo soundtrack and want to hear it through multiple channels
while preserving CPU power, select "Stereo X2" or "Stereo X3."
If you're playing an EAX-compatible game and want to enjoy the full interactive
surround experience, select "Sensaura Game" mode.
The TruSurround XT settings only appear if your Current Speaker Set is "Stereo," "Stereo
with Subwoofer," or "Headphones." The Circle Surround II settings only appear if your
Current Speaker Set is set to three or more channels.
SRS TruSurround XT Enable - This control turns on the TruSurround XT feature.
TruSurround XT "virtually" places individual surround channels where they are
supposed to be, as though you have speakers all around you. Use this feature to turn
5.1 multi-channel sources, such as Dolby Digital or DTS-encoded DVDs, into "virtual"
surround from your stereo speakers. To use this function, select "6 Channel" from within
your DVD program's audio output selection menu.
SRS Circle Surround II Enable - This control turns on the Circle Surround II feature.
Circle Surround II is a patented SRS technology that solves the problem of playing 5.1
multi-channel content from a two-channel source. It delivers a compelling surround
sound experience through any multi-channel playback system. Use this feature to turn
stereo sources such as CDs, MP3s or Dolby Pro Logic-encoded DVDs into 5.1 multi-
channel surround. Turn this feature off if you're listening to a source that's already
playing back in 5.1 surround, such as Windows Media or a DVD movie.
SRS TruSurround XT/Circle Surround II Modes - There are three modes to the Circle
Surround II and TruSurround XT feature. Use "Cinema" when watching films or television
programs. Select "Music" to listen to stereo music sources in surround. Choose "Mono"
to spread out a mono source like old movies or various internet radio stations.
SRS Dialogue Enhancement™ - This feature is designed to make dialogue more
intelligible. Click the "Enable" checkbox to enable this feature, and use the Level slider
to control the amount of enhancement applied to the dialogue.
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SRS TruBass - This feature takes the low bass from big-theater soundtracks and turns
it into frequencies that home speakers can reproduce. When you use this feature, you
don't need to worry about missing out on the big bass rumbles of submarine missile
launches or spacecraft flybys just because you're using small computer speakers. Click
the "Enable" checkbox to turn on the TruBass feature, and use the Level slider to add
more bass.
and
TruSurround XT are incorporated under license from SRS Labs, Inc.
are trademarks of SRS Labs, Inc.—Circle Surround II and
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