Yamaha RX-V3900 Guida Utente

■ Selecting decoders for multi-channel 

If you connected surround back speakers, use this feature 
to enjoy 6.1/7.1-channel playback for multi-channel 
sources using the Dolby Pro Logic IIx, Dolby Digital EX, 
DTS-ES, or Neural-THX decoders.

Set the operation mode selector to F

AMP and 

then press M

EXTD SUR. on the remote control 

y

Use this feature to activate the desired decoder manually when 
this unit cannot detect the signal flag encoded to the input 
sources correctly.

• The available decoders vary depending on the setting of the 

speakers and the input sources.

• 6.1/7.1-channel playback is not possible in the following cases:

– when “Surround” (page 87) or “Surround Back” (page 88) is 

set to “None”.

– when the component connected to the MULTI CH INPUT 

jacks is being played.

– when the source being played does not contain surround left 

and right channel signals.

– when a Dolby Digital KARAOKE source is being played.
– when this unit is in the stereo playback, 7ch Enhancer 

(page 45) or PURE DIRECT (page 47) mode.

– when “BI-AMP” is set to “ON” (page 122).

• If “EXTD Surround” is set to “Auto” (page 99), the decoder 

mode is automatically set to “AUTO” every time this unit is 
turned off.

• “Neural-THX” is only available on the U.S.A. and Canada 

models.

Activates the optimum decoder to play back 
signals in 6.1/7.1 channels when this unit 
recognizes a signal flag being input.

Decoders
(PLIIx Movie, 
PLIIx Music, 
EX/ES, 
Neural-THX)

Use this feature to activate the desired decoders 
for the playback of multi-channel sources 
manually.

OFF

Does not use any decoders to create 6.1/7.1 
channels.