AP20 & Dirac Live®
room correction technology
Sound Defined.
Sound Quality to Match The Picture
The advancements in picture quality over the past years have
been vast, with improvements to HD and 3D technologies.
However, the sound has steadily been lagging behind. Now is the time
to think about sound! By upgrading your sound you will not only put
the quality of the sound and the picture back at par, but you will also
differentiate yourself towards your competitors.
Sound is recorded according to the intentions of the artist and
producer. However, how it will reach the listener is uncertain,
thanks to the broad array of listening rooms and loudspeakers
used. Rooms and loudspeakers inevitably distort the sound
both in the frequency domain and the time domain.
Shorten Tuning Time
The amount of time required for tuning is less with Dirac Live compared to
manual tuning. You will save time and reach the same high-quality result
each time.
Sound Refined.
Optimized Results
By digitally optimizing the output from each speaker of the audio
system such that it is perfectly adjusted to the acoustical behavior
of the listening environment, a much more transparent and
true-to-the-source sound can be delivered.
AP20
AUDIO PROCESSOR
ROOM OPTIMIZATION TECHNOLOGY
Get More Out of Your Equipment
Dirac Live makes your current equipment better. By using Dirac Live you
will enable your current equipment to perform in the same league as more
expensive equipment. Performance increases and cost decreases.
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Room Correction
for high end sound
Most room correction solutions employ
minimum-phase filters and introduce spurious
time-domain artifacts. Sometimes too detailed
high-frequency adjustments are used, leading
to a slight decorrelation between the different
speakers. Other systems measure only in a limited region, failing to collect all relevant information about the sound field, consequently leading
to a non-robust adjustment.
patented Methods
and technical specifications
better sound
Musical clarity and voice intelligibility
By digitally optimizing the output from each speaker of the audio system
such that it is perfectly adjusted to the acoustical behavior of the listening
environment, a much more transparent and true-to-the-source sound can
be delivered. Voice intelligibility is improved and music becomes clearer.
More Distinct Bass Punch
Acoustic room modes distort the character of the bass and loudspeakers
continue to ring even after a bass punch has been delivered due to mechanical
restrictions. Dirac Live effectively prepares the loudspeaker for the sound
that is coming and reduces the settling time of the loudspeaker, thereby
achieving a much tighter bass. By adjusting the speaker outputs to the room
modes, the character of the bass is restored to that intended on the recording.
Dirac Research has worked for many years on these problems, patented
solutions and published results in the leading journals. Dirac learned to deal
with these problems in one of the most challenging acoustic environments
by working with luxury car partner BMW. Now the technology is available
to the cinema industry with Datasat Digital Entertainment’s AP20 Audio
Processor.
Magnitude response correction
Dirac’s patented methods offer just the right resolution. Based not only on an
average response, the stationary frequency response correction looks at the variations between different measurement positions and carefully makes a correction
whose level of detail depends on the frequency-dependent spatial variations.
Mixed-phase technology
Dirac’s mixed-phase filter technology provides the highest performance available.
Loudspeakers measured in rooms are mixed-phase and consequently only a mixedphase correction can restore the intended impulse response. Room correction
systems that only provide minimum-phase or linear-phase correction fail to improve
aspects which determine the perceived localization and clarity of a sound event.
Impulse Response Optimization
Dirac Live is unique to the marketplace in that it provides true working
impulse response correction as measured over a large listening region. The
impulse response is critical for stereo perception. Localization and stereo
hearing, in general, depends on the similarity between and the quality of the
left and the right channel impulse responses. Dirac Live improves the precision and the clarity of the stereo image.
Better Benefits
Early Reflections Are Reduced
These type of reflections, from the same direction as the speaker, are known
to cause smearing and shifting of the stereo image as well as reduced distinctness. The effects of side-reflections are quite different. They give a certain
coloration of the sound, but actually make it easier to localize and distinguish
different sound events. Dirac Live only reduces the stationary spectral coloration that such side-reflections cause, but no attempt is made to remove them.
Restored Sound Stage
Dirac Live restores the sound stage so that the localization of sound
events become much more detailed. Since stereo perception depends
crucially on the similarity, or correlation, between the signals at the left
and right ears, which in turn is determined by the impulse responses of
the left and right signal paths, only true mixed-phase impulse response
correction can improve the spatial perception of a sound reproduction.
Dirac Live is the solution to achieve this in a large listening volume.
Reduced Listening Fatigue
Distortions in the frequency domain and in the time domain make it
demanding for our brains to interpret the sound. A smooth frequency
response and an aligned phase response makes the sound more natural
and prevents listening fatigue during prolonged listening sessions. According to Japan Advanced Institute of Science & Technology, phase
distortions are a major cause of listening fatigue. With the unique phase
alignment and magnitude response optimization of Dirac Live, listening
becomes effortless. Your ears will remain fresh and your senses clear.
Datasat and the Datasat logos are trademarks of Datasat Technologies AG
Dirac Live® is a registered trademark of Dirac Research.
®
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