Multi Input Setup, Dolby Pro Logic | Rotel RSX-1550 specification

42	RSX-1550 Surround Sound Receiver

particular type or unless the default setting is temporarily overridden by the front panel or remote surround mode buttons.

Note: Default surround modes are stored independently for the analog and digital inputs for each source.

Options for the default surround modes are: Dolby Pro Logic II, Dolby 3 Stereo, DSP 1, DSP 2, DSP 3, DSP 4, 5ch Stereo, 7ch Stereo, PCM 2 Channel, DTS Neo:6, Bypass (for analog input only), and Stereo.

Multi Input Setup

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Note: The following types of digital discs or source material are generally detected automatically and the proper decoding activated with no action or setting required: DTS, DTS-ES Matrix 6.1, DTS-ES Discrete 6.1, Dolby Digital, Dolby Digital Surround EX, Dolby Digital Plus, Dolby TrueHD, DTS-HD Master Audio, DTS-HD High Resolution Audio, Dolby Digital 2-channel, PCM 2- Channel, PCM 96kHz and MP3.

Since Dolby Digital 5.1 and DTS sources are detected and decoded automatically, the default setting typically tells the receiver how to process a 2-channel stereo signal. For example, you might have your CD input default to 2-channel stereo, DVD and VCR inputs default to Dolby Pro Logic II processing for matrix-encoded Dolby surround material, and TUNER input default to one of the DSP modes.

In some cases, the default setting can be manually overridden by the front panel surround mode buttons or the SUR+ button on the remote. See the Manually Selecting Surround Modes section of this manual for more information on which settings can be overridden.

Two of the default surround mode settings available on this menu offer additional choices. Dolby Pro Logic II decoding offers a choice of CINEMA or MUSIC settings, etc. DTS Neo:6 decoding also offers a choice of CINEMA or MUSIC settings. When either Dolby Pro Logic II or DTS Neo:6 is selected with this menu item, the current setting choice will also be displayed. In addition, the function of the ENTER button changes, taking you to a sub-menu where you can change the settings and/or additional parameters for Dolby Pro Logic II or DTS Neo:6 decoding. See the following section for details.

GROUP DELAY: Also known as “lip-sync” delay, this setting delays the audio signal for an input by the speciﬁed amount to match the video input. This feature can be useful when the video signal is delayed more than the audio signal as sometimes happens with upconverted digital TV processors or when trying to match a radio broadcast with the video from a sports event.

The range of available settings is from 0ms to 500ms, in 5ms increments. The setting is individually stored for each input and is the default group delay each time that input is selected. The setting can be temporarily overridden from the front panel or the remote.

To return to the MAIN menu from the INPUT SETUP menu (except when Dolby Pro Logic II or DTS Neo:6 is selected in the SURR MODE ﬁeld), press the ENTER button. Press the MENU/OSD button on the remote to cancel the menu display and return to normal operation.

When the MULTI INPUT source is selected on the INPUT SETUP menu, the available options change to reﬂect the fact that these inputs are direct analog inputs and bypass the receiver’s digital processing. The INPUT, CINEMA EQ, DEFAULT MODE and GROUP DELAY options are not available since these are all digitally implemented features.

The VID INPUT, INPUT LABEL, INPUT ATT and 12V TRIGGER options are still available and work as described on the previous menu.

One additional option, LFE REDIRECT, provides an alternative bass management conﬁguration. Typically, the eight channels of the MULTI INPUT are conﬁgured as pure analog bypass signals, going straight from the inputs to the volume control and the preamp outputs, bypassing all of the digital processing. There are no crossovers and no bass management; therefore, whatever signal goes into the subwoofer channel will be sent to the subwoofer preamp output.

This conﬁguration may not be ideal for multichannel systems conﬁgured with high-pass speakers, redirecting bass to a powered subwoofer. An option, called LFE REDIRECT, sends the seven main channels directly to the outputs as usual. In addition, it takes a duplicate copy of these seven channels, combines them into mono, and routes them through a 100Hz analog low-pass crossover to the subwoofer preamp output. This creates a summed mono subwoofer signal, derived from the seven main channels of the MULTI INPUT.

Use the LFE REDIRECT OFF setting for the pure analog bypass conﬁguration. Use the LFE REDIRECT ON setting to derive the mono summed subwoofer output.

Dolby Pro Logic IIx

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When Dolby Pro Logic IIx is selected as the default surround mode on the INPUT SETUP menu, there are additional settings and parameters to optimize the surround decoding for music or movie soundtracks. Dolby Pro Logic II uses matrix decoding algorithms to derive a center channel and surround channels from 2-channel source material.

The ﬁrst line of the Dolby Pro Logic IIx sub-menu selects CINEMA, MUSIC, GAME, or PRO LOGIC modes for matrix decoding. Use the +/– buttons on the remote to select a mode.

RSX-1550 English v2.indd 42

27/8/08 14:22:23

Rotel RSX-1550 owner manual Multi Input Setup, Dolby Pro Logic

Models: RSX-1550

RSX-1550 Surround Sound Receiver

Multi Input Setup

Dolby Pro Logic IIx