Yamaha HTR-5990 Editing Sound Field Parameters, What is a sound field?, Elements of a sound field

EDITING SOUND FIELD PARAMETERS

What is a sound field?

A significant factor that creates the rich, full tones of a live instrument are the multiple reflections from the walls of the room. In addition to making the sound live, these reflections enable us to tell where the player is situated, and the size and shape of the room in which we are sitting.

■Elements of a sound field

In any environment, in addition to the direct sound coming straight to our ears from the player’s instrument, there are two distinct types of sound reflections that combine to make up the sound field:

Early reflections

Reflected sounds reach our ears extremely rapidly (50 ms

–100 ms after the direct sound), after reflecting from one surface only — for example, from the ceiling or a wall. Early reflections help add clarity to the direct sound.

Reverberations

These are caused by reflections from more than one surface — walls, ceiling, the back of the room — so numerous that they merge together to form a continuous sonic afterglow. They are non-directional, and lessen the clarity of the direct sound.

Direct sound, early reflections and subsequent reverberation taken together help us to determine the subjective size and shape of the room, and it is this information that the digital sound field processor reproduces in order to create sound fields.

If you could create the appropriate early reflections and subsequent reverberations in your listening room, you would be able to create your own listening environment. The acoustics in your room could be changed to those of a concert hall, a dance floor, or virtually any size room at all. This ability to create sound fields at will is exactly what YAMAHA has done with the digital sound field processor.

Changing parameter settings

You can enjoy good quality sound with the factory preset parameters. Although you do not have to change the initial settings, you can change some of the parameters to better suit the input source or your listening room.

					LEVEL		PRESET/CH	SET MENU		PURE DIRECT
POWER	POWER	STANDBY	POWER		TITLE			MENU
TV	AV				BAND			SRCH MODE
A	XM	AUDIO SEL	SLEEP	4,5						NIGHT
							ENTER			AUDIO	2
PHONO	TUNER	CD	MULTI CH IN		A-E/CAT.			ON SCREEN		STRAIGHT
					RETURN			DISPLAY
V-AUX	CBL/SAT	MD/TAPE	CD-R		XM MEMORY					EFFECT	3
					STEREO		MUSIC	ENTERTAIN		MOVIE
					1		2	3		4
DTV	VCR 1	DVR/VCR2	DVD		THX		STANDARD	SELECT		EXTD. SUR
					5		6	7		8
					1	MEMORY 2		A	SPEAKERS B
			SELECT		9		0	+10		ENT.
					FREQ/RDS		EON	MODE	PTY SEEK START
+	+	+	AMP	1	REC
TV VOL	CH		SOURCE		DISC SKIP
		VOLUME
–	–	–	TV		OFF	ON	MACRO LEARN		CLEAR RE–NAME

(U.S.A. model)

1Set AMP/SOURCE/TV to AMP.

AMP

SOURCE

TV

2Turn on the video monitor and press ON SCREEN repeatedly to select the full display

mode.

ON SCREEN

DISPLAY

y

For details on selecting the OSD mode, see page 87.

PROGRAMS SOUND FIELD

59