Okay maybe I am wrong I got my info from an online manual
Hi
Im my HT i have a Denon AVR-1908 receiver.
it only allows for me to select DTS and others Dolby Digital isnt an option
Detailed specifications of AVR-1908
http://usa.denon.com/ProductDetails/3635.asp
SOUND MODES
Dolby Pro Logic IIx – with Cinema, Music, Game Modes
Dolby Digital Surround EX Decoding
dts ES Discrete 6.1 Decoding
dts ES Matrix 6.1 Decoding
dts Neo:6 Stereo-to-Surround Cinema and Music Modes
dts 96/24 5.1 for DVD-Video Processing
Audio Signal Delay (Sync. Audio with Video signal) – By source
Stereo/Direct Modes w/Pure Analog Path
Video Game Mode
Mono Movie Surround Mode
Rock Arena Surround Mode
Matrix Surround Mode
Jazz Club Surround Mode
Virtual Surround Mode – For 2 Speakers/Headphones
Multi-Channel Stereo Mode 5/6/7
DSP Effect Modes 7
Auto Surround Mode (Analog or Digital Input Type)
Active Center Channel In All Surround Modes
Dynamic Discrete Surround Circuit - Digital HD Dynamic Discrete Surround Circuit - Digital HD
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From your manual pages 34-35
http://usa.denon.com/AVR-1908-OM-E_109.pdf
To select these surroound modes using the buttons on the main remote control unit press the
STD button. The mode switches each time the button is pressed
Almost all of the surround options are under DSP Simulation playback:
"The surround paramters can be adjusted (page 59, 60) to achieve an even more realistic, powerful sound field"