Tascam DA-78HR - Manual (Page 43)

7 - Advanced operations
43
TASCAM DA-78HR
2 Press the SUB MENU key until the display
shows RLs. ( RLS —release) and then changes
to the current value for that setting.
3 Use the ▲ and ▼ keys to change the value
between the
FAST (
FAST ),
SLOW (
SLOW )
and
MED (
MEDIUM ) settings.
7.9 Sine oscillator
The DA-78HR incorporates a digital oscillator for
lineup and signal tracing purposes. This oscillator is
a sine-wave oscillator at either the standard tuning
frequency of 440 Hz or a tape line-up signal at
1 kHz.
The oscillator signal level is at the nominal signal
level (but note that since the oscillator is a constant
sine wave, it cannot truly be compared with “real-
world” transient signals).
To operate the oscillator:
1 Press the SHIFT key so that the SHIFT indicator
is flashing, and press the MENU key until the
display shows Audio. 2--
( AUDIO2--).
2 Press the SUB MENU key until the display
shows
OSC. ;;; (
OSC xxx , for oscillator,
with the current setting).
3 Use the ▲ and ▼ keys to switch the oscillator
between the different settings (
OFF (
OFF ),
440 (
440 ), and
1k (
1k ).
When the oscillator is turned on, it overrides
all other track inputs.
The oscillator setting is not backed up with the other
settings.
NOTE
When using the oscillator, you should turn down the
monitor levels in the control room and studio to avoid
damage to your ears (and the speakers).
7.9.1 Recording the oscillator
As mentioned above, the oscillator overrides all other
track inputs, regardless of whether digital or analog
input has been selected.
Recording the oscillator test tone is therefore similar
to any other recording operation.
7.10REC MUTE (recording silence)
There may be times when you wish to prevent any
signal from reaching an armed track (in other words,
when you record, you are recording silence onto the
track.
1 Press the SHIFT key so that the SHIFT indicator
is flashing, and then press the MENU key until
the display shows Audio. 1-- ( AUDIO1-- ).
2 Press the SUB MENU key until the display
briefly shows
REC. MUTE
( REC MUTE ) and
then changes to show the current setting (the
default is all off).
3 Change the settings using the ▲ and ▼ keys.
4 To set record muting for individual tracks, use
the track
REC FUNCTION keys as track selec-
tion keys, and change the settings individually
for each track using the ▲ and ▼ keys.
The display will show the track number and
the current mute setting (e.g.
TR 1 OFF (
TR
1 OFF ).
5 When no track is selected using the REC
FUNCTION keys, the display reverts to
ALL
( ALL ), as it does if all tracks are the same
value.
If the SHIFT and REC FUNCTION
keys are used, each meter shows the
record mute status of the correspond-
ingly-numbered track, as shown here
(only one segment lights to show the
mute status).
Press SHIFT and one of the REC
FUNCTION keys (as described in
4.1.1, “Peak meters”) to toggle this
meter mode off and on. The default at
power-on is for this mode to be on.
Pressing the ▲ and ▼ keys together makes the
default
ALL OFF setting.
7.11Dither
Dither is the technique of adding a known noise to
low-level signals, especially when converting from a
high number of bits (for instance 24 or 20 input bits,
as in the case of the DA-78HR) to a lower number
O N
O FF