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Chapter 4 - Operations
GTP-870HD Owner’s Manual
Other Surround Modes
7.1 m
2
Uses an Adcom-proprietary digital pro-
cessing technology to expand incoming
stereo signals to 7.1-channel surround
sound. Use if:
• Your source component is connected to the ana-
log or digital audio inputs.
• Your source audio is in 2-channel analog or digi-
tal PCM format.
• You have seven speakers plus a subwoofer.
STEREO
Passes an incoming or downmixed stereo signal to
the front speakers. Use if:
• Your source component is connected to an ana
-
log or digital audio input.
• Your source audio is in 2-channel analog or digi-
tal PCM format.
• You have at least two speakers (LF/RF), or would
simply prefer to listen to a multi-channel source
through your two front speakers.
HALL
Creates a hall or amphitheater effect from an incom
-
ing or downmixed stereo signal. Use if:
• Your source component is connected to an ana-
log or digital audio input.
• Your source audio is in 2-channel analog or digi-
tal PCM format.
• You have at least two speakers (LF/RF), or would
simply prefer to listen to a multi-channel source
through your two front speakers.
5-STEREO
Generates maximum output for a five speaker sys
-
tem. The rear speakers are driven with the same
signal as the front left and right, while the center
speaker is a monophonic summation of the front
speakers. Use if:
• Your source component is connected to an ana-
log or digital audio input.
• Your source audio is in 2-channel analog or digi-
tal PCM format.
• You have at at least five speakers (LF/RF, C, LS/
RS).
Tone Control
Manual Bass/Treble Control
Follow these steps to make Bass/Treble adjustments
on the fly:
• Press the Bypass button on the remote control to
toggle Tone Control on.
• Use the Bass and Treble buttons to bring up the
tone adjustment on-screen display.
• Use the / buttons to set the desired level.
Notes:
• The tone adjustment on-screen display times out
after 3 seconds if no button is pressed.
• Tone controls are not available in the Dolby
Digital EX, DTS-ES, NEO6, and Pro Logic IIx Surround
modes.