Pioneer VSX-520 manual Using surround back channel processing

04Listening to your system

Phase Control technology provides coherent sound reproduction through the use of phase matching1 for an optimal sound image at your listening position. The default setting is on and we recommend leaving Phase Control switched on for all sound sources.

•With a 7.1-channel surround system, audio signals that have undergone matrix decoding processing through surround back channel processing to which the Up Mix function is added are output from the surround back speakers.

ADAPTER TUNER PORTABLE

TV

RECEIVER SLEEP SOURCE CONTROL

PHASE S.RETRIEVER SIGNAL SEL VOL

RECEIVER INPUT SELECT	DTV/TV
	INPUT

HDD DVD VCR

1 2 3 DISP

TEST TONE	SB CH	CH SELECT
4	5	6	CH
MIDNIGHT SPEAKERS		LEV
7	8	9	CH
DIMMER		LEV	SHIFT

•Press PHASE to switch on phase to switch the Phase Control on or off.

Using surround back channel processing

You can have the receiver automatically use 6.1 or 7.1 decoding for 6.1 encoded sources (for example, Dolby Digital EX or DTS-ES), or you can choose to always use 6.1 or 7.1 decoding (for example, with 5.1 encoded material). With

5.1encoded sources, a surround back channel will be generated, but the material may sound better in the 5.1 format for which it was originally encoded (in which case, you can simply switch surround back channel processing off).

•Press RECEIVER , then press SB CH repeatedly to cycle the surround back channel options.

Each press cycles through the options as follows:

•SB ON – Matrix decoding processing for generating the surround back component from the surround component is turned on.

•SB AUTO – Matrix decoding processing for generating the surround back component from the surround component is switched automatically. Matrix decoding processing is only performed when surround back channel signals are detected in the input signals.

•SB OFF – Matrix decoding processing for generating the surround back component from the surround component is turned off.

Note

1Phase matching is a very important factor in achieving proper sound reproduction. If two waveforms are ‘in phase’, they crest and trough together, resulting in increased amplitude, clarity and presence of the sound signal. If a crest of a wave meets a trough (as shown in the upper section of the diagram above) then the sound will be ‘out of phase’ and an unreliable sound image will be produced.

•If your subwoofer has a phase control switch, set it to the plus (+) sign (or 0°). However, the effect you can actually feel when PHASE CONTROL is set to ON on this receiver depends on the type of your subwoofer. Set your subwoofer to maximize the effect. It is also recommended you try changing the orientation or the place of your subwoofer.

•Set the built-in lowpass filter switch of your subwoofer to OFF. If this cannot be done on your subwoofer, set the cutoff frequency to a higher value.

•If the speaker distance is not properly set, you may not have a maximized PHASE CONTROL effect.

•The PHASE CONTROL mode cannot be set to ON in the following cases:

–When the PURE DIRECT mode is switched on.

–When the headphones are connected.

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