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August 1, 2010

Dolby Height–DPLIIz

Filed under: Audio Knowledge — Tags: , , — Alan @ 1:00 am

There seems to be some confusion about Dolby Labs’ latest refinement of its Dolby Pro Logic II processing algorithm, which it dubbed “DPLIIz.”

As most enthusiasts know, Dolby Pro Logic has evolved over the years as a digital logic processor of stereo signals from any source, adding ambient and directional cues to create a 5.1- or 7.1-channel system from a stereo recording—CDs, DVD movie soundtracks, Blu-ray discs, even old stereo hi-fi videotapes. As a primer for newcomers, DPLII takes stereo information and “locks” in a center channel signal (movie dialogue or solo singers, for instance), detects ambient information and routes that to two surround channels (5.1), and leaves hard-mixed left and right information in the main front left and right speakers where it belongs.

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May 1, 2009

My Blu-ray Outputs Only Stereo

Q. I have a P-965 preamp that lacks HDMI and a multi-channel power amplifier. My Sony Blu-ray BDP-S300 player can output true surround audio only through the HDMI output. When it is connected through the optical cable, it mixes down everything into 2 channels. Since my P-965 preamp does not have HDMI, how do I get true surround sound? – D.M.

A. There are two ways to get surround sound from your Sony Blu-ray player.

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