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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"
RC
1 Output the "Test Tone".
TEST
TONE
2 Adjust the levels of the other speakers than the front
speakers (left, right).
To increase
(1) While test tone is output from a speaker,
MULTI
level
CONTROL
(2) Adjust the volume level of the speaker.
LEVEL
To decrease
level
To decrease
level
3 Quit the speaker level adjustment.
TEST
TONE
4
Adjust the delay time. "DELAY"
RC
1 Select the Delay Time adjustment display.
MODE
2 Adjust the Delay Time.
To increase
MULTI
CONTROL
LEVEL
To decrease
To decrease
3 Quit the delay time adjustment.
Front
speakers
Am
Bm
Surround
speakers
GRC
Test Tone
ENTER
Test Tone
ENTER
Channel
Level
To increase
SL+10dB
level
ENTER
Test Tone
ENTER
Return
Return
ENTER
GRC
Delay Time
ENTER
Delay Time
20msec
To increase
ENTER
Return
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.
5
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 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)
(In 3 STEREO mode)
TEST Lch
(Front speaker, Left)
TEST Cch
(Center speaker)
TEST Rch
(Front speaker, Right)
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.
RC/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.
÷ Select the closest value to the value obtained by "How to calculate the
delay time".
D E L A Y
Ambience effects
C-V351/C-V301 (EN)
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
26
16
6
29
23
17
5
26
20
16
4
4
23
17
3
3
20
B (m)
2
2
1
1
2 )
Delay time
37
8
7
ms
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