Adcom GTP-880 owner manual Surround Mode Buttons, Surround Format Information

and after three seconds the display defaults to its previous status. Volume setting can range from -80dB to +10dB.

On the remote control, press the mute button to tempo- rarily switch off the sound to the preamp outputs. Mute mode is indicated by the word “mute” in the display area. Press mute again or adjusting the volume will restore sound. Mute does not affect recordings made using the tape or VCR outputs but does affect the signal going to the preamp outputs.

Adjusts the volume level for the main room only. Room two is not affected by this control.

[9] Surround Mode Buttons

With the surround mode buttons the available surround sound modes can be selected. The selected surround mode is permanently indicated in the display area and is also shown for three seconds in the large text section of the display.

7.1m²™ Button: Pressing this button activates ADCOM’s proprietary decoding algorithm.

This proprietary analog-domain post-processing technique takes 5.1 channel or other sources that have surround channel information and extracts a psuedo-stereo sur- round back channel information. Only DSP modes that do NOT generate more than 2 surround channels (e.g. - Dolby Digital, DTS, 5 Stereo, Dolby Pro Logic, Dolby Pro Logic

IICinema, Dolby Pro Logic II Music, DVD-Audio Bypass Input, SACD Bypass Input) can benefit from ADCOM 7.1m2 post-processing. Trying to enable ADCOM 7.1m2 during any other DSP mode (e.g. Dolby Digital EX, DTS-ES Extended Surround, 7 Stereo, 2 Channel Bypass) is Invalid and will be indicated as such by the system. Additionally if the system setup up does NOT indicate that the system setup offers 2 surround back channels, ADCOM 7.1m2 will never be offered as option.

Pressing this button again turns 7.1m²™ decoding off and returns to previously selected surround mode.

Select Left/Right Button: Pressing this button cycles through list of available surround modes.

1.4 Surround Format Information

The GTP-880 provides decoding for Dolby Pro Logic® II, Dolby Digital® 5.1, Dolby Digital EX®, DTS®, DTS- ES® Discrete, DTS-ES® Matrix, DTS NEO:6® and ADCOM 7.1m²™. Within each mode, the GTP-880 also offers a wide range of additional processing options. This means you can precisely match a surround mode to your program mate-

rial, loudspeaker setup and personal taste. In addition, the GTP-880 precision bass management feature provides maximum flexibility when setting up your audio surround system (see “system setup” for further details).

ADCOM 7.1m²™: ADCOM’s proprietary decoding algorithm. The 7.1m²™ decoding process mixes the signals from the left surround and right surround channels to derive two unique signals sent to each back output. The benefit of our 7.1m²™ decoding process is enhance imaging between the surround speakers and the creation of a more diffuse ambient sound field. The 7.1m²™ process has the same benefits when compared to other matrix decoding as stereo signals have over mono signals. The 7.1m²™ process can also be used to drive your surround back speakers when you are listening to an externally decoded DVD audio or SACD multichannel disc. Due to the varying nature of film soundtracks and music, you may prefer to activate or deactivate the surround back channels. For example, Dolby Digital 5.1 and DTS soundtracks benefit greatly from the addition of the 7.1m²™ processing. ProLogic soundtracks on the other hand provide a mono surround signal track, which yields a less satisfying experience when using the surround back channels.

Note: 7.1m2 decoding may only be applied to 5 channel signals.

Dolby Digital: This digital audio format provides 5.1- channel surround sound. Dolby Digital source material includes DVDs, laser discs, HDTV broadcasts, some satellite delivered programming, and the output of some digital cable set top boxes.

Dolby Digital Surround EX: This processing mode is a joint development of Dolby Laboratories and the THX division of LucasFilm, Ltd. Film soundtracks encoded with Dolby Digital Surround EX technology contain an extra channel, added to the soundtrack during mixing, called surround back, which places audio behind the listener in addition to the existing front left, front center, front right, surround left, surround right, and subwoofer channels. This additional channel provides more detailed imaging behind the listener creating more depth, spacious ambience and sound localization than before.

Note: Surround EX mode can also be engaged during the playback of 5.1 channel material that is not Dolby Digital Surround EX encoded. When used this way, signals from the left and right surrounds are used to synthesize the surround back channel. Results using this method will vary

ADCOM GTP-880 Owner’s Manual 9