Denon AVR-1705 Operating Instructions Manual

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Denon AVR-1705 Operating Instructions Manual Manual pdf 32 page image

32ENGLISH18 ADDITIONAL INFORMATIONOptimum surround sound for different sourcesThere are currently various types of multi-channel signals (signals or formats with more than two channels).2 Types of multi-channel signalsDolby Digital, Dolby Pro Logic, DTS, high definition 3-1 signals (Japan MUSE Hi-Vision audio), DVD-Audio,SACD (Super Audio CD), MPEG multi-channel audio, etc.“Source” here does not refer to the type of signal (format) but the recorded content. Sources can be dividedinto two major categories.2 Types of sources• Movie audio Signals created to be played in movie theaters. In general sound is recorded to beplayed in movie theaters equipped with multiple surround speakers, regardless of theformat (Dolby Digital, DTS, etc.).FL CSW FRFL CSW FRSL SRSBSL SRSBMultiple surround speakers(For 6.1-channel system)Movie theater sound fieldListening room sound fieldIn this case it is important to achieve the samesense of expansion as in a movie theater with thesurround channels.To do so, in some cases the number of surroundspeakers is increased (to four or eight) or speakerswith bipolar or dipolar properties are used.SL: Surround L channelSR: Surround R channelSB: Surround back channel• Other types of audio These signals are designed to recreate a 360° sound field using three to fivespeakers.In this case the speakers should surround the listener from all sides to create auniform sound field from 360°. Ideally the surround speakers should function as“point” sound sources in the same way as the front speakers.FL CSW FRSL SRThese two types of sources thus have different properties, and different speaker settings, particularly for thesurround speakers, are required in order to achieve the ideal sound.Surround back speakersA 6.1-channel system is a conventional 5.1-channel system to which the “surround back” (SB) channel has beenadded. This makes it easy to achieve sound positioned directly behind the listener, something that waspreviously difficult with sources designed for conventional multi surround speakers. In addition, the acousticimage extending between the sides and the rear is narrowed, thus greatly improving the expression of thesurround signals for sounds moving from the sides to the back and from the front to the point directly behind thelistening position.FL CSW FR FL CSW FRSR chSL chSL ch SR chSB chChange of positioning and acoustic imagewith 5.1-channel systemsMovement of acoustic image from SR to SLChange of positioning and acoustic imagewith 6.1-channel systemsMovement of acoustic image from SR to SB to SLWith this set, speaker(s) for 1 or 2 channels are required to achieve a 6.1-channel system (DTS-ES, etc.). Addingthese speakers, however, increases the surround effect not only with sources recorded in 6.1 channels but alsowith conventional 2- to 5.1-channel sources. All the Denon original surround modes (see page 26) are compatiblewith 6.1-channel playback, so you can enjoy 6.1-channel sound with any signal source.2 Placement of the surround left and right channels when using surround back speakersUsing surround back speakers greatly improves the positioning of the sound at the rear. Because of this, thesurround left and right channels play an important role in achieving a smooth transition of the acoustic imagefrom the front to the back. As shown on the diagram above, in a movie theater the surround signals are alsoproduced from diagonally in front of the listeners, creating an acoustic image as if the sound were floating inspace.To achieve these effects, we recommend placing the speakers for the surround left and right channels slightlymore towards the front than with conventional surround systems. Doing so sometimes increases thesurround effect when playing conventional 5.1-channel sources in the 6.1 surround or DTS-ES Matrix 6.1mode. Check the surround effects of the various modes before selecting the surround mode.