Arcam AVR100 manual Channel delays, 6ft, Distance to listening position Your measure

Channel delays page

For best results in a surround sound system, the sound from all loudspeakers should reach the listener at the same time. To help achieve this the AVR100 can add slight delays to certain channels when in Dolby Digital or Dolby Pro Logic modes.

When playing a Dolby Digital source you can set a delay for the centre channel of between 0 and 5ms and a delay for the rear channels of between 0 and 15ms.

SETUP

1INPUT SETTINGS

2CHANNEL BALANCE

3CHANNEL DELAYS

4SPEAKER SETTINGS

5EXIT

CHANNEL DELAYS

CENTER 3ms

REAR 6ms

DO NOT SAVE AND EXIT SAVE AND EXIT

CHANNEL DELAYS

CENTER 0mS

REAR 0mS

DO NOT SAVE AND EXIT SAVE AND EXIT

To calculate these delay times, first measure (or estimate) the distances from the listening position to the front, centre and rear speakers. Keep a record of these distances by entering them under the heading ‘Your measure’ in the table provided. The centre channel delay is calculated by subtracting the centre channel distance from the front left (or right) distance. The difference represents the CENTRE delay time.

The rear channels’ delay time is calculated by subtracting the rear left (or right) distance from the front left (or right) distance. The difference represents the REAR delay time. Note that if your rear loudspeakers are further from the listening position than the front loudspeakers, you should set this delay to 0ms.

front	centre
left

e.g. 4m	e.g. 3m
(12ft)	(9ft)

e.g. 2m

(6ft)

rear

left

front right

rear right

If you have made your measurements in feet, one foot approximates to one millisecond (1ms) delay. If you have made your measurements in metres, one metre approximates to three milliseconds (3ms) delay.

Distance to listening position		e.g.	Your measure
Front left or right	12ft or 4m		---------------------
Centre	9ft or 3m		---------------------
Rear left or right	6ft or 2m		---------------------
Difference		e.g.	Delay (ms)
CENTRE delay	(12 – 9ft) or (4 – 3m)
	= 3ft or 1m		3 milliseconds
REAR delay	(12 – 6ft) or (4 – 2m)
	= 6ft or 2m		6 milliseconds

When playing a Dolby Pro Logic source you can set a delay for the rear channels between 15 and 30ms. There is no delay setting for the centre channel.

The rear channel delay in Dolby Pro Logic is calculated by adding 15ms to the rear channel delay calculated for Dolby Digital. In our example, this is 15ms + 6ms = 21ms.

CHANNEL DELAYS

CENTER N/A

REAR 21ms

DO NOT SAVE AND EXIT SAVE AND EXIT

	NOTE: It is not necessary to adjust delay times for a DTS
AVR100
	(Digital Theater Systems) source.
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