monolith HTP-1, Инструкция по установке и эксплуатации

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HTP-1 Installation and User Guide Release 1.8.1
5.1 vs 7.1 Surround Speakers
The surround speakers are illustrated at 90 degrees in the diagram above. The positioning of this
speaker pair is not completely agreed between the three codecs.
90 degrees is recommended by Dolby and DTS for a 7.1 system. DTS refers to these as the “side
surrounds” as opposed to the “surrounds” that are used with a 5.1 system. The other codecs don’t
make this distinction. The various codecs agree that the surround speakers should be located closer to
110 degrees when no rear speakers are present. Auro-3D recommends the surround speakers be at 110
degrees in all cases. Dolby and DTS acknowledge a range of acceptable surround speaker locations from
90 to 110 degrees. Auro-3D consistently recommends 110 degrees. Hence 110 degrees is absolutely
correct for a 5 channel main level system. Dolby and DTS encourage the side surrounds to move
forward to 90 degrees when adding the back speaker pair. Auro-3D does not. You must choose a
compromise based on your listening preferences and your room.
Note also that DTS deals with this discrepancy by “remapping” the two 5.1 native “surround” speakers
to the four 7.1 native side and rear surround speakers. A 5.1 DTS track played on a 7.1 system will be
rendered as a 7.1 signal by splitting the surround speakers. The same effect can be achieved with a
Dolby signal using Dolby Surround or the upmixers from Auro and DTS. They will all similarly split a 5.1
signal to 7.1.
Top Middle vs High Side
The Dolby Atmos decoder can be commanded to produce a channel pair labeled “top middle”. If you
only have two upper speakers, Dolby prefers the top middle pair. The DTS and Auro-3D decoders
produce a pair labeled “high side”. Both Dolby and DTS acknowledge that this pair can be placed in
either location (high side or top middel). Auro3D
™
specifies a “height side left/right” pair at 110
degrees. Like the surround speakers, the three codecs simply do not agree on the use of the upper
speakers.
If you have only four upper speakers, then the Auro3D
™
high side pair will be reproduced through the
upper rear pair. This arrangement is very good for Dolby and DTS but it’s less optimal for Auro3D
™
. If
you have six upper speakers, then the Auro3D
™
high side pair will be reproduced through the top
middle/high side pair. If you are an Auro aficionado you should probably place your top middle speakers
high on the wall. A strict Dolby aficionado will want to use a more closely spaced pair on the ceiling. A
more widely spaced pair on the ceiling splits the difference.
Note that the Auro3D
™
“voice of god” speaker channel is reproduced by splitting it between the top
middle speakers.
It’s also important to note that the placement of the upper speakers matters much more for Auro3D
™
coded content than it does for the AuroMatic
™
upmix. The AuroMatic upmix is generally synthesizing a
pleasing effect while the Auro3D
™
decoder can aim to accurately reproduce a carefully recorded signal.
HTP-1 User Manual Page 28 V1.8.1