Dsp Options - NAD M17 Owner's Manual

DSP OPTIONS

The following signal processing parameters can be setup under the DSP
(Digital Signal Processing) Options menu.
IMPORTANT NOTICE
The M17 is an AV Surround Sound Preamplifier and therefore has no
speakers. The mention of "Speaker(s)" in this manual refers to the
speakers of your external amplifier as interfaced with the M17.
LIP SYNC DELAY
DSP Options has the feature "Lip Sync Delay" whose function is to match
any delay that may occur in the picture relative to the audio.
By varying "Lip Sync Delay" from 0ms to 120ms, one can delay the audio
output in order to synchronize it with the video image.
ADC (ANALOG-TO-DIGITAL CONVERTER) RATE
An analog audio input is converted to digital signal by making use of M17's
superb circuitry called analog-to-digital converter (ADC).
Using this ADC Rate feature, the sampling rate of the resulting digital audio
signal (available at the digital output ports) can be converted into three
levels – 48K, 96K and 192K. Make sure that the associated equipment will
be able to handle the applicable digital audio signal level.
AUDYSSEY MultEQ
Audyssey MultEQ becomes available among the DSP options only after
successfully completing Audyssey Auto Calibration (accessible through
the Setup Menu). Refer also to Audyssey Auto Calibration segment of the
Speaker Setup under Operation - Using the M17 - Setup Menu.
Audyssey MultEQ can be set to the following levels
Audyssey: Audyssey developed target curve.
Flat: This setting is appropriate for very small or highly treated rooms
in which the listener is seated quite close to the loudspeakers. MultEQ
filters are used in the same way as the Audyssey curve, but it does not
apply a high frequency roll-off.
NAD: Ideal "in room" response developed by NAD engineers along with
Audyssey Engineers.
Off: MultEQ filters are not used or no measurement process at all.
AUDYSSEY DYN EQ (AUDYSSEY DYNAMIC EQ)
Audyssey Dynamic EQ solves the problem of deteriorating sound quality as
volume is decreased by taking into account human perception and room
acoustics. By carefully combining information from incoming source levels
with actual output sound levels in the room, Audyssey Dynamic EQ delivers
unprecedented sound reproduction at all volume levels.
Audyssey Dynamic EQ selects the correct frequency response and surround
volume levels moment-by-moment. The resulting bass response, octave-
to-octave balance and surround impression remained the same despite
changes in volume.
USING THE M17 – MAIN MENU
Audyssey Dynamic EQ is designed to work in conjunction with Audyssey
MultEQ. Dynamic EQ determines the proper loudness compensation based
on the sound pressure level measurements MultEQ provides. Audyssey
Dynamic EQ working in tandem with Audyssey MultEQ provides the right
listening conditions for every listener at any volume level.
On: Activate Audyssey Dynamic EQ function.
Off: Defeat Audyssey Dynamic EQ function.
Offset: Adding a Volume Offset will have the effect of reducing the
amount of boost applied by Dynamic EQ, for any given volume setting.
As a consequence, the amount of overall digital attenuation required
is also reduced. For example, with the Offset set to 10dB, and a volume
setting of -30.0dB, the loudness curve selected will be for a volume level
of -20.0dB.
The offset level can be set from 0dB to 15dB.
AUDYSSEY DYNAMIC VOLUME
Audyssey Dynamic Volume delivers consistent volume playback levels,
anticipating sudden spikes and dips in volume and compensating for them
in real time. Audyssey Dynamic Volume monitors the volume of program
material moment-by-moment, maintaining the desired listening level for all
content while optimizing the dynamic range to preserve the impact.
Audyssey Dynamic Volume includes Audyssey Dynamic EQ, which
compensates for deteriorating sound quality as volume is decreased
by taking into account human perception and room acoustics. These
two technologies enable the full frequency response of the source at its
original level to be reproduced at any listening level. Even at lower listening
volumes, Dynamic Volume ensures that the richness and dynamics of the
response are maintained.
Audyssey Dynamic Volume can be set to the following levels
Light: Provide the least adjustment to the loudest or softest sound
level.
Medium: Setting that prevents loud and soft sound from being much
louder than their respective average sound levels.
Heavy: Affect volume the most by causing all sound to be of equal
loudness.
IMPORTANT NOTES
• Audyssey Dynamic EQ must be set to "On" to activate Audyssey Dynamic
Volume. If Audyssey Dynamic EQ is set to "Off", Audyssey Dynamic
Volume will also remain "Off".
• If Audyssey Auto Calibration is not set up, the relative balance of your
system's loudspeakers has to be manually adjusted (with the aid of a SPL
meter) for Audyssey Dynamic Volume and Audyssey Dynamic EQ to be
effective. If the speakers are not properly calibrated, the corresponding
Audyssey Dynamic Volume and Audyssey Dynamic EQ responses could
be distorted. Refer also to the item about "USING SPL METER" in the
SPEAKER LEVELS section below.
OPERATION
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