H8 DSP
Digital Interface Processor
User’s manual
8
37
Example of time delay setting (Fig.4):
1.
Choose the system listening point.
To identify the listening point, choose an ideal point located at the
center of the listener’s (driver or passenger) head.
For the front center and rear center points choose an intermediate
point between the two (left / right) listeners.
2.
Measure the distance between each speaker or group of speakers
and the listening point in a straight line (“as the crow flies”).
For each speaker choose the center of the mobile membrane as the
emission point.
For groups of speakers choose an intermediate point between them.
It will then be possible to perform fine tuning by using the Fine Set
function.
(fig.6)
3.
Select the channel related to the speaker under examination on
the Channel Map and enter the respective distance value in the Set
Distance box of the Filter Settings menu.
(fig.5)
4.
Repeat step 3 for each channel.
5.
Perform all time delays settings, start playing music and select
the Fine Set box. By shifting the values between positive or negative
(except for the Subwoofer in
Fig.6
since it is the farthest speaker), the
best time alignment and correct acoustic scene can be obtained.
It is advisable to listen to different types of music (percussion,
melodic, etc.) for a comprehensive evaluation of the different
musical instruments coherence (space stability).
6.
Once the time alignment procedure is complete, you can work
on the output equalizer
(see 8.12)
, to optimize the system response in
accordance with the level alignment of different frequencies.
Remark:
measurements for the above operations can also be taken by
using a spectrum analyzer with an appropriate microphone.
The results must be assessed with final refining listening tests.
WARNING:
If you click on the “passenger” listening point once the
distances for the “driver” listening point has been set, the
H8 DSP
will not re-calculate the delays for the new reference
point because the buttons available in the SELECT A CHANNEL
diagram are merely descriptive. Their only purpose is to
remind you that you have set the delays for that specific
listening point!
Fig. 4
Fig.6
Fig. 5
83 cm
105 cm
164 cm
90 cm
127 cm
132 cm
78 cm
116 cm
