When hooked up with the digital-audio output from a DVD-Video player or digital satellite receiver, the 75 watts-per-channel HTR-5540 handles 5.1-channel surround decoding for both major formats, Dolby Digital and DTS. In addition, the HTR-5540 processes Dolby Digital EX and DTS-ES, which create an even more expansive soundfield through the use of a center-rear surround channel, totaling six discrete full-range channels in addition to the LFE (low-frequency effects) channel: left, center, right, and left, center, and right surround.

Non-Dolby Digital and DTS sources can benefit from surround processing, too. With enhanced directional steering over standard four-channel Dolby Pro Logic, Dolby Pro Logic II provides five channels of surround processing from any stereo source--whether that's a TV broadcast, VHS tapes, or your favorite CDs, cassettes, and LPs. Pro Logic II delivers full-bandwidth stereo surround channels with 40 dB of left-right separation.

A key benefit from a Yamaha receiver, of course, is Yamaha's proprietary signal processing, including Cinema DSP (digital soundfield processing), which creates aural "imaging" that not only makes your home sound like a theater, but also sounds better than most movie theaters. Based on a wealth of measured data in studios and halls, Cinema DSP is designed to bring out the full potential of movie sound mixes, reproducing them the way directors and sound engineers intended.

And, when you're listening to multichannel presentations late at night, you'll appreciate Silent Cinema, which simulates 5.1-channel listening through a pair of ordinary 2-channel headphones (not included). Silent Cinema uses unique parameters for each soundfield to ensure accurate headphon