Yamaha RX-V640 manual From digital input, through digital processing, to, every step of the way

RX-V640

NEW PRODUCT BULLETIN

From digital input, through

digital processing, to

amplification, maximum

signal quality is maintained

every step of the way.

	2				1
	32-Bit High-Density		High Performance Digital Circuitry
	Cinema DSP Circuitry
Digital	Advanced	96 kHz/		Input		Accurate
						Touch
	Decoding
Input		24-Bit		6-Ch		Volume
	Circuitry
		DACs				Control
	Including
		for All 9*				(0—-99dB,
	32-Bit DSP
		Channels				0.5 dB
	LSI
						Step) for
	(YSS-938)
6-Ch						6 Channels*
Input
	Minimal Analog
	Processing

3

High Current Amplification

6-Ch High Output Power

•Main L

•Main R

•Center

•Rear L

•Rear R

•Rear Center

*In addition to the six channels (Main L/R, Center, Rear L/R, Rear Center) there is a subwoofer output (hence 6.1-channel format compatibility) and two front effect channels (a total of 9 DACs). The front effect channel signals, unique to Yamaha CINEMA DSP, are mixed with the main channel signals to achieve more precise separation of dialogue, music and effects on the front sound stage and a superior sense of presence as compared to other systems.

are smaller (2/3 previous types), so signal paths are shorter and there is more space for the large power supply components. Digital interference is reduced and impedance is lower as well.

Accurate Touch Volume Control No one expects more from a volume

control than up and down — except Yamaha. We decided that controlling the volume could be made both easier and more accurate, and the result is the Accurate Touch Volume Control. It lets you make delicate adjustments within a narrow range, yet enables you to move to very high or low levels more quickly.

Its extreme accuracy is due to a high- signal-resolution analog design in conjunction with an ultra-precise digital control circuit (Yamaha original YAC-520 LSI). The wide control range extends from 0dB to 99dB, with narrow 0.5dB steps throughout the entire range for delicate control, even at low volumes.

Brief Guide to Movie Sound Formats

Dolby Pro-Logic	response in all channels (3Hz — 20kHz), 2)
Dolby Lab’s basic 4-channel format, widely	discrete surround channels, and 3) a
used in ordinary theaters and for home	separate track for bass only, called the Low
videos.	Frequency Effects channel.
Dolby Pro Logic II	Dolby Digital EX

DTS-ES Matrix 6.1

In this format, the back surround channel is matrix encoded into the left and right surround channels. For playback, the three channels are separately decoded.

Improved version of Dolby Pro-Logic for music and movies. With a more intelligent matrix decoder, it is suitable for both stereo and surround-encoded sources. It offers “bass management” as well as the option of incorporating “width,” “dimension” and “panorama” controls.

Dolby Digital

Dolby's latest surround format, this is Dolby Digital with an added center rear channel. The rear center channel is actually matrixed into the two rear channels, and is extracted upon playback. (Formerly called Dolby Digital Surround EX, or Dolby Digital Matrix 6.1.)

DTS Digital Surround

DTS-ES Discrete 6.1

DTS-ES uses its large bandwidth to provide a fully discrete rear center channel, as opposed to a matrixed one.

DTS Neo:6

Provides 5.1 or 6.1 channels of matrix decoding from stereo matrix material. Also decodes Extended Surround matrix

The most popular 5.1-channel home theater	The basic DTS 5.1 channel sound format.
sound system. An improvement over Dolby	Uses a higher data rate than Dolby Digital.
Pro-Logic in that it offers: 1) Full frequency

soundtracks and has a Music mode to expand stereo non-matrix recordings to 5.1 or 6.1 channels.

3/10 (R/L/T/K)