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How to calculate the
proper delay time
Assuming that the distance from
the front speakers is A meters and
that from the surround speakers
is B meters:
What is delay time?
The sound entering the ears include the direct sound coming from the sound source and the indirect sounds reflected from the walls, floor,
ceiling, etc. The indirect sounds are delayed because they travel longer distance required for reflection before they reach the ears. The delay
time is the difference in time between the direct sound and indirect sounds.
3
Adjust the level from each speaker. "Test Tone"
Main unit
1 Output the "Test Tone".
(Remote control only)
2 Adjust the levels of the other speakers
than the front speakers (left, right).
(1) While test tone is output from a speaker,
(2) Adjust the volume level of the speaker.
To decrease
level
3 Quit the speaker level adjustment.
4
Adjust the delay time. "DELAY"
Main unit
1 Select the Delay Time adjustment dis-
play.
MU
MODE
2 Adjust the Delay Time.
MULTI.CONTROL
LEVEL
To decrease
To decrease
To increase
3 Quit the delay time adjustment.
Front
speakers
Am
Bm
Surround
speakers
GRC
Test Tone
ENTER
Test Tone
ENTER
Channel
Level
SL+10dB
To increase
level
ENTER
Test Tone
ENTER
Return
ENTER
GRC
Delay Time
ENTER
Delay Time
20msec
To increase
ENTER
Return
ENTER
1 Use the delay time calcula-
tion chart on the right.
Example:
When A = 3 m,B = 3 m,
the delay time is 20 ms.
8
2 Use the following
7
6
formula for calculation.
Delay time =
A (m)
20 + 3 × (A - B) (Unit: ms)
÷ The test tone which sounds like noise move across speakers in the
following sequence every 1.5 second.
(In Pro Logic or AC-3 mode)
TEST Lch
(Front speaker, Left)
TEST Cch
(Center speaker)
TEST Rch
(Front speaker, Right)
TEST SRch
(Surround speaker, Right)
TEST SLch
(Surround speaker, Left)
TEST SWch
(Subwoofer)
(In 3 STEREO mode)
TEST Lch
(Front speaker, Left)
TEST Cch
(Center speaker)
TEST Rch
(Front speaker, Right)
TEST SWch
(Subwoofer)
÷ The test tons is not output from the speaker which has been set to off.
Speaker setup
T E s T s R c h
Display when test tone is output from a surround speaker
÷ Be sure to adjust from the listening position.
÷ Each press of the key increases or decrease the level by 1 dB.
÷ The levels of the front speaker (Left, Right) cannot be varied in step 3.
Main unit
Each press switches the adjustment items as shown below.
1 BASS
:Tone, Bass
2 TREBLE
:Tone, Treble
3 L- - - - - - -R
:Balance
4 C ch
:Center speaker
5 SR ch
:Surround speaker, Right
6 SL ch
:Surround speaker, Left
7 SW ch
:Subwoofer
8 DELAY
:Delay time
9 INPUT
:Input level
÷ Adjustment items 5, 6 and 8 are not required in the 3 STEREO mode.
÷ Find the optimum delay time for the listening room by referring to "How
to calculate the delay time".
÷ The delay time in the PRO LOGIC mode can be adjusted between 15 and
30 ms.
÷ The delay time in the AC-3 mode is automatically decreased by 15 ms from
that set in the PRO LOGIC mode.
÷ Select the closest value to the value obtained by "How to calculate the
delay time".
D E L A Y
Ambience effects
C-V750 (En/T)
20
23
17
16
26
20
29
23
17
26
20
16
29
23
17
26
20
16
29
23
17
26
20
16
29
23
17
20
16
26
29
23
17
5
5
26
20
16
4
4
23
17
3
3
20
B (m)
2
2
1
1
2 )
Delay time
37
8
7
6
r
ms
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