Dolby® Pro Logic® IIz for Expanded Surround Sound Dolby Pro Logic IIz adds a vertical dimension to the soundstage, expanding the surround-sound from 5.1-channel or stereo sources to 7.1 channels. Front Height channels carry ambient, non-directional audio to immerse you further into movies and games. High Quality Digital-to-Analog Converter Nov 12, 2016 · If the chip is malfuntioning, you don't get power to the amps and thus no sound. If you have this problem, you will notice that the speaker icons that you usually see in the top left corner of the display are gone. Another sign when powering up is that you don't hear that second click of the power relay feeding the amp section.
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Nov 14, 2011 · I have an Onkyo TX-NR509 receiver and use it to control the audio, but I keep getting conflicts with the Media Center audio controls. If I use the Media Center audio controls, especially muting, I loose all audio. Sometimes I can get it back by unplugging and re-connecting the HDMI cable between the computer and the receiver.