monolith HTP-1, Инструкция по установке и эксплуатации

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HTP-1 Installation and User Guide Release 1.8.1
Dirac Off
Dirac delay and trim values are ignored. User trims are used. The HTP-1 bass manager is engaged. The
signal is presented without modification. The GUI says "Dirac Off".
This three step cycle is known as the “Dirac bypass loop”. As the result of a Dirac calibration can have
large negative trim values, the system may be much louder with Dirac off. If your system is arranged
this way, you may wish to use the third party provided preset recorder to make buttons to switch
between Dirac On and Bypass modes. Or you may wish to work on your calibration to remove this
discrepancy.
Tips for a Successful Dirac Calibration
(with thanks to the AVS forum)
Dirac is generally not too sensitive to small differences between calibrations, but a few tips can help it all
go more easily.
●
Make an initial measurement (only one set of sweeps) in the center of the sound stage. This
should be equidistant to and exactly between the front left and front right speakers, even if
there is no seat exactly between these two speakers. After performing the calibration, verify this
location by checking the Dirac Calibration Delay (ms) values for the front left and front right
speakers in the Calibration tab of the HTP-1 configuration. These should be equal to or very
close to each other.
●
For the first measurement only, the mic should be at ear height when sitting down in the main
seat. For the UMIK-1, the mic should be pointing straight up, the tip of the mic should be at ear
level, and the 90 degree calibration file should be used.
●
While taking a single measurement for the Dirac calibration can be useful for testing purposes, it
will not give Dirac enough information to produce a calibration result that sounds good (it may
sound dry and dull). The more data Dirac is given, the better the results end up being.
●
While the sliders on the Dirac volume page can be used to adjust the signals to match more
closely, better results will be achieved if external volume controls can be used. Try to match the
volumes of the various speakers using amplifier volume controls, if possible. If not, Dirac can do
it.
○
It’s important to establish the proper levels for all speakers, including the sub channel,
at the beginning of the Dirac calibration. The final speaker output levels are closely
influenced by which speaker has the lowest level during the calibration. Dirac reduces
the gain on speakers that are too loud, but does not add gain for speakers that are too
quiet. If any speaker, or speaker group, has a level that is too low, all final output levels
will be lowered to match this, requiring a higher master volume setting to reach normal
listening levels. This can be frustrating as there will be a significant volume mismatch
with Dirac on or off. The user trims can be adjusted to accommodate differences of a
few dB, but differences of 10dB really need to be adjusted at the amplifier.
●
All remaining measurements should be taken at positions several inches above or below the first
mic position. For example, my ear height when sitting down at the main seat is 41 inches. So
HTP-1 User Manual Page 55 V1.8.1