Pacific Microsonics HDCD Model Two User Manual page 21

Setup & Operation
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Model Two HDCD User's Manual
DD88-44 Mode
In DD88-44 Mode, the Model Two performs 88.2 kHz to 44.1 kHz sampling frequency
conversion using HDCD adaptive decimation filtering. Fixed decimation filtering can also
be used for special cases, such as some synthesized sources. The 44.1 kHz output word
length is selectable between HDCD 24, 20, or 16-bit. Selectable, two-wire, standard speed,
or single wire, double speed AES signal formats are used for the 88.2 kHz stereo input
signal (SETUP/INPUT/FORMAT/1_WIRE or 2_WIRE). When two wire is selected, digital in-
put 1 is channel 1, and digital input 2 is channel 2. When single wire is selected, digital
input 1 is stereo. In DD88-44 Mode, only one word length can be selected for the 44.1 kHz
output, which appears at both digital output 1 and digital output 2. Between +6 and -25.9
dB (+12 to -19.9 dB if Peak Extend is used) of signal level adjustment is available using
DSP gain in the Levels Menu (LEVELS/DSPGAIN). Factory Presets: DD2X-24, DD2X-16.
DD44-88 Mode
In DD44-88 Mode, the Model Two performs 44.1 kHz to 88.2 kHz sampling frequency
conversion using advanced high resolution HDCD interpolation filtering. The 44.1 kHz
input accepts 24-bit, 20-bit, 16-bit, or 16-bit HDCD signals, with HDCD 16-bit amplitude
decoding and gain scaling available. The 88.2 kHz output word length is selectable be-
tween HDCD 24, 20, or 16-bit. Monitoring the 88.2 kHz output in DD44-88 Mode provides
enhanced D/A conversion accuracy for 44.1 kHz signals, and is excellent for converting
44.1 kHz sources such as DAT's for analog processing during mastering. Selectable, two-
wire, standard speed, or single wire, double speed AES signal formats are used for the 88.2
kHz stereo output signal (SETUP/OUTPUT/FORMAT/1_WIRE or 2_WIRE). When two wire is
selected, digital output 1 is channel 1, and digital output 2 is channel 2. When single wire
is selected, digital outputs 1 and 2 are stereo. Between +6 and -25.9 dB of signal level
adjustment is available using DSP gain in the Levels Menu (LEVELS/DSPGAIN). Factory
Preset: DD1X-2X.
DD88-88 Mode
In DD88-88 Mode, the Model Two performs 88.2 kHz, 24-bit, 20-bit or 16-bit word length
conversion, level adjustment using DSP gain, and reinsertion of HDCD LSB code. Reinser-
tion of HDCD LSB code is necessary when producing HDCD DVD-Audio release masters
if 88.2 kHz HDCD signals have their data altered during digital post production pro-
cessing. Selectable, two-wire, standard speed, or single wire, double speed AES signal
formats are used for the 88.2 kHz stereo signal, and may be independently set on inputs
and outputs (SETUP/INPUT or OUTPUT/FORMAT/1_WIRE or 2_WIRE). When two wire is
selected, digital input and output 1 are channel 1, and digital input and output 2 are
channel 2. When single wire is selected, digital input 1 and outputs 1 and 2 are stereo
signals. Between +6 and -25.9 dB of signal level adjustment is available using DSP gain in
the Levels Menu (LEVELS/DSPGAIN). Factory Preset: DD2X-2X.
P A C I F I C M I C R O S O N I C S I N C .
Rev. C - January 2002
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