Dsp Options - NAD M15 HD Owner's Manual

DSP OPTIONS

The following signal processing parameters can be setup under the DSP
(Digital Signal Processing) Options menu.
IMPORTANT NOTICE
The M15 HD 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 M15 HD.
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 M15
HD'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 M15 HD – 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.
USING THE M15 HD – MAIN MENU
NOTES
• "AUDYSSEY" and a lit green box icon are illuminated at the VFD if NAD,
Audyssey or Flat is selected. If "Off" is selected, "AUDYSSEY" and the
green box icon will not be illuminated.
• If NAD, Audyssey or Flat is selected and changes are done at the "Tone
Controls", "Speaker Configuration", "Speaker Levels" and "Speaker
Distance" settings, "AUDYSSEY" and a lit red box icon are illuminated
at the VFD. Restore the parameter to its previously calibrated Audyssey
setting by adjusting back the altered configuration.
• Audyssey MultEQ options can also be directly selected or changed using
HTRM's AUDYSSEY button with DEVICE SELECTOR set to AMP mode.
Toggle AUDYSSEY button to select "Audyssey MultEQ" and then use the
[D/F] to select through the Audyssey MultEQ options. Press AUDYSSEY
again to save the selected option and at the same time move on to the
next menu setting or exit the menu setting altogether.
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.
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.
NOTE
Audyssey Dynamic EQ and Audyssey Dynamic Volume (see below)
can be directly selected or changed using HTRM's AUDYSSEY button
with DEVICE SELECTOR set to AMP mode. Toggle AUDYSSEY button to
select "Dyn EQ" or "Dyn Vol" and then use the [D/F] to select through
their respective options. Press AUDYSSEY again to save the setting and
at the same time move on to the next option or exit the menu setting
altogether.
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
-30dB, the loudness curve selected will be for a volume level of -20dB.
The offset level can be set from 0dB to 15dB.
OPERATION
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