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Setup & Operation
8. From the Operating Menu, select (SETUP/OUTPUT/OUT_2). Then select the digital
output 2 word length. HDCD_24 is selected by preset AD+DD1X.
9. In the Digital Output 1 Word Length Menu (OUT_1), select the digital output 1 word
length. HDCD_16 is selected by preset AD+DD1X.
Digital Post Production Processing
The Model Two's post production processing capabilities include converting signal word
lengths using HDCD dither and optional 16-bit amplitude encoding, decimating 176.4/192
kHz signals to 88.2/96 kHz or 44.1/48 kHz and decimating 88.2/96 kHz signals to 44.1/48
kHz using HDCD dynamic decimation filtering, interpolating 44.1/48 kHz signals to 88.2/
96 kHz or 176.4/192 kHz and interpolating 88.2/96 kHz signals to 176.4/192 kHz using
HDCD high resolution interpolation filtering and adjusting digital signal level using low
distortion HDCD DSP Gain. The Model Two converts word lengths between 24-bits, 20-bits,
and 16-bits at all of its sampling rates. The Model Two interfaces with a wide variety of
digital audio recorders and editing workstations. NOTE: The bit structure of HDCD signals
may not be altered without losing the HDCD LSB code. If digital processing that loses
the code is performed on HDCD 24-bit recordings intended for 24-bit DVD format
release, the LSB code must be reinserted by passing the signal through the Model Two
set up in the same 24-bit D to D mode. To perform digital processing of HDCD 16-bit
amplitude encoded (using Peak Extend or Low Level Extend) recordings, the Model
Two must first be used to decode them to 24-bit or 20-bit signals prior to processing,
and then is used to encode them back to HDCD 16-bit after processing.
Setup for 44.1 kHz Word Length Conversion & HDCD 16-bit Encoding
In DD44-44 Mode, the Model Two converts 44.1 kHz digital signals from longer word
lengths to HDCD 16-bit using selectable HDCD dither and optional amplitude encoding. It
also converts HDCD 16-bit signals to 24-bit or 20-bit word lengths.
1.
From the Operating Menu, select (SETUP/MODE/44.1_X)
2.
Connect a 24-bit or 20-bit 44.1 kHz digital source to the AES 1 Input.
3.
Connect AES Output 1 or 2 to a digital audio recorder or DAW.
4.
From the Operating Menu, select (SETUP/PRESETS) and select preset DD1X-16.
5.
Or, from the Operating Menu select (SETUP/MODE/MORE.../DD44-44).
Once the Model Two is set up for digital word length conversion, other parameters such as
Digital Input Word Length, Digital Output Word Length, Digital Output HDCD Setup, etc.
may be changed as desired. See pages 47-58 in the Reference section.
Setup for 88.2/96 kHz to 44.1/48 kHz Decimation & Word Length Conversion
In DD88-44 or DD96-48 Modes, the Model Two converts 24-bit or 20-bit, 88.2/96 kHz
P A C I F I C
Rev. C - January 2002
Model Two HDCD
M I C R O S O N I C S
®
30
®
User's Manual
I N C .
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