Pioneer VSA-AX10 - Manual (Page 99)

99
En
Techno Tidbits & Problem-solving
EXPER
T
Dolby Pro Logic II
Dolby Pro Logic II is an improved version of Dolby Pro Logic technology with extended matrix decoding
technology that can create 5.1 channel sound from two channel sources. Dolby Pro Logic II creates basic 5
channel sound by using the innovative "steering logic" circuit. Therefore when listening to typical two-channel
sources like CD, the listener can enjoy a richer spatial effect. When using software encoded with Dolby
Surround, this decoding system affords the listener an improved surround experience with greater sound detail.
Chart Comparing Dolby Pro Logic and Dolby Pro Logic II
This unit has a three Dolby Pro Logic II functions. The first is "Movie Mode" (suitable for film soundtracks);
"Music Mode" (suitable for music); "Pro Logic Mode" (this mode is less sensitive to the quality of the source
material, so may be useful when Movie Mode or Music Mode do not give good results). One can select one of
them depending on your soundtrack of choice.
For amplifiers and components other than the VSA-AX10-S Dolby Pro Logic II may not have the
above mentioned functions. memo
Surround Sound Mono Stereo
Pro Logic Pro Logic II
Effective sound source Dolby Surround encoded sources All two channel stereo sources
Frequency Range Surround within 7kHz All Channels/Full Range
Dolby Digital Surround EX
This new recording technology is able to play 6.1 channel sound and was developed in a collaboration between
Dolby Laboratories and Lucasfilm, Ltd. for the film "Stars Wars: The First Episode", the first movie ever to be
made with Dolby Digital Surround EX technology. In a movie theater this format affords the listener vivid
surround sound experience replete with the effect of sounds flying overhead, even for those seated towards the
sides of the theater.
Dolby Digital Surround EX contains surround back channels which are dubbed into the soundtrack in studio. The
channels are encoded into the left and right channels of the soundtrack so this format can be compatible with
Dolby Digital 5.1 channel decoding. For a list of movies that contain Dolby Digital Surround EX soundtracks see
Dolby website at: http://www.dolby.com
Dolby Digital EX is the pure decoding technology of Dolby Digital Surround EX format.
MPEG Audio
MPEG is an audio encoding system which delivers high quality audio for music and movies. By removing
frequencies which are out of the human hearing range, the sound is then compressed to enable the
transmission of mono, stereo, or multichannel (5.1 and 7.1) audio in a single bitstream which is why it has
become a standard audio format for DVD and personal computers. The composition and versatility of MPEG
audio also ensures that the presentation of a multichannel soundtrack will sound appropriate on everything from
a 7.1 channel surround sound home theater setup to a mono television set. Above all, MPEG audio is designed
to be compatible with past and future MPEG audio versions, which means that future versions of MPEG audio
will be compatible with decoders currently being produced (the signal is merely reconfigured to fit the number of
channels available in a system).