3 - Menu functions
TASCAM DA-45HR
19
3.6 Digital output format
Sets the format of the digital audio data output from
both digital audio outputs (the
AES/EBU
XLR con-
nector and the
COAXIAL
RCA connector).
The options available are
AESEBU
(AES/EBU
format) and
Consmr
(SPDIF format).
The default is
AESEBU
.
3.7 Digital out word length
When a tape has been recorded in
HR(24BIT)
mode,
it may be necessary to play back the material at 16-
bit resolution.
Note that the format of the digital audio data will
always be output in the format as selected above (3.6,
"Digital output format") from both connectors (
AES/
EBU
and
COAXIAL
).
The options available are
24bit
and
16bit
.
The default value is
24bit
.
3.8 Dither
Dithering is the technique used to improve resolution
at low levels, with resulting loss of quantization
noise
1
. It is particularly useful when playing back
audio recorded with higher number of bits than the
destination is capable of receiving.
When playing back a recording made in 24-bit HR
mode, dithering may be used if the internal D/A con-
vertors are used. There is no effect if dithering is
selected, and 16-bit output word length is selected.
In the STANDARD mode, any dither settings made
are applied to the signal as it is recorded.
The triangular (
Tri.
) setting reduces noise more
effectively than the rectangular (
Rect.
)
2
, but
both reduce the signal-to-noise ratio compared to the
off
setting, triangular more than rectangular.
There is no rule for using dither—different circum-
stances demand different settings.
The default setting here is
off
.
3.9 Copy prohibit
Sets the level of copy protection for tapes recorded
using this tape deck.
The menu items control the writing of the copy pro-
tection bit in the subcode of the recorded material.
The options available are:
Free
(no copy protec-
tion is applied to the recorded material),
1gen
(one generation only of digital copying is possible
from tapes produced when this setting is made), and
Prohbt
(no digital copying at all is possible).
The second option is equivalent to the SCMS system
implemented on consumer DAT recorders.
The default value here is
Free
.
3.10End ID
Sets whether an END ID is automatically written
whenever recording stops.
The two options available are:
No WR
(no END
ID is written when recording stops) and
AutoWR
(an END ID is automatically written when recording
stops). When an END ID is written, the display
shows
WR-EE
.
When playing back and an END ID is encountered,
EE
is shown on the display, and playback stops. The
tape then either stops or rewinds, depending on the
setting made in 3.15, "Auto rewind".
The default value is
No WR
.
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1.
A full disc
ussion of dither and other digital
audio techniques is outside the scope of this
manual. However, a good starting point for
learning about this, and other aspects of digital
audio, is John Watkinson’s The Art of Digital
Audio, pub Focal Press
2. These names refer to the shape of the proba-
bility curve describing the noise applied to the
original signal as part of the dither process.
C
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p
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Summary of Contents for DA-45HR
Page 9: ...TASCAM DA 45HR 9...
