Pioneer VSX-21TXH User Guide

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• STEREO – See Listening in stereo above for more on 

this.

• F.S.SURR FOCUS – Use to provide a rich surround 

sound effect directed to the center of where the front 
left and right speakers sound projection area 
converges.

• F.S.SURR WIDE – Use to provide a surround sound 

effect to a wider area than FOCUS mode.

1

Use the Stream Direct modes when you want to hear the 
truest possible reproduction of a source. All unnecessary 
signal processing is bypassed, and you’re left with the 
pure analog or digital sound source.

Check the digital format indicators in the front panel 
display to see how the source is being processed.

• AUTO SURROUND – See Auto playback on page 56.

• ALC – Listening in Auto level control mode (page 56).

• DIRECT – Sources are heard according to the 

settings made in the Surround Setup (speaker 
setting, channel level, speaker distance, acoustic 
calibration EQ, and X-curve), as well as with dual 
mono, the input attenuator, and any sound delay 
settings. You will hear sources according to the 
number of channels in the signal.

• PURE DIRECT – Analog sources are heard without 

any digital processing. No sound is output from the 
Speaker B in this mode.

• Default setting: SBch ON

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 5.1 encoded 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).

• 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.

 

cycle the surround back channel options.
Each press cycles through the options as follows:

• SBch ON – Matrix decoding processing for 

generating the surround back component from the 
surround component is turned on.

• SBch 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.

• SBch OFF – Matrix decoding processing for 

generating the surround back component from the 
surround component is turned off.

1 When using F.S.SURR WIDE, a better effect can be obtained if the Full Auto MCACC procedure under Advanced MCACC is performed. For 

more on this, refer to Automatically setting up for surround sound (Auto MCACC) on page 41.

2   When  headphones are plugged in, the AUTO SURROUND and DIRECT are cannot be selected.

FOCUS position 

(Recommended)

WIDE position

Front left 

speaker

Front right 

speaker

Front left 

speaker

Front right 

speaker

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