Pioneer VSX-21TXH User Guide

En

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2 Pro Logic IIx MUSIC – Up to 7.1 channel sound, 
especially suited to music sources

1

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2 Pro Logic IIx GAME – Up to 7.1 channel sound, 
especially suited to video games

•

2 Pro Logic – 4.1 channel surround sound (sound 
from the surround speakers is mono)

• Neo:6 CINEMA – 7.1 channel sound, especially 

suited to movie sources

• Neo:6 MUSIC – 7.1 channel sound, especially suited 

to music sources

2

• Neural THX – Up to 7.1 channel sound, especially 

suited to music sources

3

SBch ON, you 

can select (according to format):

•

2 Pro Logic IIx MOVIE – See above (only available 
when you’re using two surround back speakers)

•

2 Pro Logic IIx MUSIC – See above

• Dolby Digital EX – Creates surround back channel 

sound for 5.1 channel sources and provides pure decoding 
for 6.1 channel sources (like Dolby Digital Surround EX)

• DTS-ES – Allows you to hear 6.1 channel playback 

with DTS-ES encoded sources

• DTS Neo:6 – Allows you to hear 6.1 channel playback 

with DTS encoded sources

THX and Home THX are technical standards created by 
THX Ltd. for cinema and home theater sound. Home THX 
is designed to make home theater audio sound more like 
what you hear in a cinema.

Different THX options will be available depending on the 
source and the setting for surround back channel 
processing (see Using surround back channel processing 
on page 59 for more on this).

With two channel sources, press 

THX repeatedly to select 

a matrix-decoding process for the THX CINEMA mode 
(see Using surround back channel processing on page 59 
for an explanation of each process):

•

2 Pro Logic IIx MOVIE+THX CINEMA

•

2 Pro Logic+THX CINEMA

• Neo:6 CINEMA+THX CINEMA

•

2 Pro Logic IIx MUSIC+THX MUSIC

• Neo:6 MUSIC+THX MUSIC

•

2 Pro Logic IIx GAME+THX GAMES

• THX Select2 GAMES

5

With multichannel sources, press 

THX (HOME THX) 

repeatedly to select from:

6

• THX Surround EX – Allows you to hear 6.1 or 7.1 

channel playback with 5.1 channel sources

7

•

2 Pro Logic IIx MOVIE+THX CINEMA

5

• THX Select2 CINEMA

5

 – Allows you to hear 7.1 

channel playback with 5.1 channel sources

•

2 Pro Logic IIx MUSIC+THX MUSIC

• THX Select2 MUSIC

5

– This mode is suited not only for 

sources recorded in Dolby Digital and DTS, but also to 
all multi-channel music sources (DVD-Audio, etc.).

• THX Select2 GAMES

5

 – This mode is suited to 

playing the sound of games.

1 When listening to 2-channel sources in Dolby Pro Logic IIx Music mode, there are three further parameters you can adjust: C.WIDTH, 

DIMENSION and PANORAMA. See Setting the Audio options on page 66 to adjust them.

2 When listening to 2-channel sources in Neo:6 Cinema or Neo:6 Music mode, you can also adjust the center image effect (see Setting the Audio 

options on page 66).

3 Neural THX can be selected for 2-channel signals for which the input signal is PCM (48 kHz or less), Dolby Digital, DTS or analog 2-channel 

sources.

4 • When the function is set to TUNER, iPod/USB, PHONO, XM or SIRIUS, it is not possible to select 2 Pro Logic IIx GAME+THX GAMES or 

THX Select2 GAME.
• The THX mode cannot be selected in the following cases:
– When headphones are plugged in.
– When MULTI CH IN input is selected.
– When the HDMI audio output parameter is set to THROUGH in Setting the Audio options on page 66.
• When playing an SACD, 

2 Pro Logic IIx MUSIC+THX MUSIC, Neo:6 MUSIC+THX MUSIC and THX Select2 MUSIC can be selected.

5 Unavailable with only one surround back speaker connected.
6 • THX CINEMA, THX MUSIC and THX GAMES can be selected when surround back processing is set to SBch OFF, when there is no surround 

back speaker, or when playing 6.1- and 7.1-channel sources.
• THX CINEMA, THX MUSIC and THX GAMES can be selected when there are only front speakers and THX GAMES cannot be selected when 
the function is set to TUNER, iPod/USB, PHONO, XM or SIRIUS.

7 When playing DTS-encoded sources, Neo:6 CINEMA+THX CINEMA can be selected, not THX Surround EX.

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