Surround sound systems

Stereo reproduction normally uses left and right speakers, but Digital Theater Systems (DTS), Dolby Digital and Dolby Pro Logic Surround go further, adding a centre and other channels so you are immersed in sound and special effects.

Digital Theater Systems (DTS) / Dolby Digital

Both DTS and Dolby Digital split soundtrack information into 6 separate channels of sound which are output through the speaker setup: five full range channels (left, centre, right, stereo left and right surround) and a ’0.1’ (ie: limited range) bass channel. This gives you superb sound quality from DTS / Dolby Digital encoded tracks when a compatible speaker system is connected to your TV.

Most dialogue comes from the centre channel, which enhances dialogue and focuses it so it seems to come from the action on screen. The separate rear left and right channels give a dramatic sense of space, with sounds travelling in all directions between front, centre and rear channel speakers (eg: a rocket going overhead starts behind you to the left and explodes in front of you to the right). The ’0.1’ Low Frequency Effects (LFE) channel gives impact to bass sounds and to special effects more felt than heard (eg: the thud of a dinosaur footfall or the rumble of thunder).

While DTS and Dolby Digital are both high quality, ’5.1’ channel surround systems, the two systems differ in how they break down and store sound information.

They also differ in how they work with existing speaker setups: Dolby Digital has been developed to be backwardly compatible with Dolby Pro Logic and conventional stereo setups. DTS, on the other hand, focuses on the high quality, 5.1 channel surround output; choosing not to develop backward compatibility with existing sound systems.

Note:

DExternal equipment is usually connected to the TV via one of the Scart sockets to provide pictures and sound (eg: a VCR player connected to AV2). To receive a DTS or Dolby Digital encoded soundtrack from compatible equipment (eg: a DVD player, a set top box), you will also need to connect an optical or coaxial cable to one of the TVs digital audio sockets. See pages 27 to 28 for connection details, also see the Digital Audio option in the SOUND menu, page 9.

Subwoofer /	Centre speaker
LFE speaker	Centre speaker
Front	Front
left	right
speaker	speaker

Rear left	Rear right
surround	surround
speaker	speaker

Dolby Pro Logic

Dolby Pro Logic Surround uses four channels of sound: left, right, centre and a mono rear channel, giving excellent reproduction of Pro Logic encoded tracks when a compatible speaker system is connected to your TV. Most dialogue comes from the centre channel, which enhances dialogue and focuses it so it seems to come from the action on screen. The rear channel is used to immerse you in atmosphere and special effects, the same output is sent to both rear speakers.

As with Dolby Digital, Pro Logic is backwardly compatible with a conventional stereo speaker setup.

Notes:

DTo get Pro Logic information from Pro Logic encoded TV programmes, you must be able to receive stereo transmissions. If stereo transmissions are not transmitted in your area then the Pro Logic information will not be present on TV transmissions and Pro Logic decoding will only produce a

centre channel output.

DSee pages 27 to 28 for connection details.

	Centre speaker
Front	Front
left	right
speaker	speaker

Rear left	Rear right
surround	surround
speaker	speaker

TX-32PB50F, TX-28PB50F specifications

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