Additional information
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75
En
Windows Media
®
Audio 9 Professional
Windows Media
®
Audio 9 Professional (WMA9 Pro) is a
discrete surround format developed by Microsoft
Corporation.
WMA9 Pro can support up to 5.1/7.1 channel playback with
sampling rates up to 24-bit/96kHz. Using the unique WMA
compression techniques, WMA9 Pro can deliver
multichannel music and soundtracks over high-speed
internet networks at low bit rates with minimal audio
degradation. Playback may be enjoyed with the Windows
Media
®
Player 9 Series (or other third-party media player) on
a personal computer, or with an AV amplifier with on-board
WMA9 Pro decoding.
Windows Media
®
and the Windows logo are trademarks or
registered trademarks of Microsoft Corporation in the
United States and/or other countries.
About THX
The THX technologies are explained below. See
www.thx.com for more detailed information.
THX Cinema processing
THX is an exclusive set of standards and technologies
established by the world-renowned film production
company, Lucasfilm Ltd. THX grew from George Lucas'
personal desire to make your experience of the film
soundtrack, in both movie theatres and in your home
theatre, as faithful as possible to what the director
intended. Movie soundtracks are mixed in special movie
theatres called dubbing stages and are designed to be
played back in movie theatres with similar equipment
and conditions. This same soundtrack is then transferred
directly onto Laserdisc, VHS tape, DVD, etc., and is not
changed for playback in a small home theatre
environment. THX engineers developed patented
technologies to accurately translate the sound from the
movie theatre environment into the home, correcting the
tonal and spatial errors that occur. On this product, when
the THX indicator is on, THX features are automatically
added in Cinema modes (e.g. THX Cinema, THX
Surround EX).
Re-Equalization
The tonal balance of a film soundtrack will be excessively
bright and harsh when played back over audio
equipment in the home because film soundtracks were
designed to be played back in large movie theaters using
very different professional equipment. Re-Equalization
restores the correct tonal balance for watching a movie
soundtrack in a small home environment.
Timbre Matching
The human ear changes our perception of a sound
depending on the direction from which the sound is
coming. In a movie theatre, there is an array of surround
speakers so that the surround information is all around
you. In a home theatre, you use only two speakers located
to the side of your head. The Timbre Matching feature
filters the information going to the surround speakers so
that they more closely match the tonal characteristics of
the sound coming from the front speakers. This ensures
seamless panning between the front and surround
speakers.
Adaptive Decorrelation
In a movie theatre, a large number of surround speakers
help create an enveloping surround sound experience,
but in a home theatre there are usually only two speakers.
This can make the surround speakers sound like
headphones that lack spaciousness and envelopment.
The surround sounds will also collapse into the closest
speaker as you move away from the middle seating
position. Adaptive Decorrelation slightly changes one
surround channel's time and phase relationship with
respect to the other surround channel. This expands the
listening position and creates—with only two speakers—
the same spacious surround experience as in a movie
theatre.
THX Select2
Before any home theatre component can be THX Select2
certified, it must incorporate all the features above and
also pass a rigorous series of quality and performance
tests. Only then can a product feature the THX Select2
logo, which is your guarantee that the Home Theatre
products you purchase will give you superb performance
for many years to come. THX Select2 requirements cover
every aspect of the product including pre-amplifier and
power amplifier performance and operation, and
hundreds of other parameters in both the digital and
analog domain.
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