Tascam DA-78HR User Manual download pdf (Page 43)

7 - Advanced operations

TASCAM DA-78HR

Press the

SUB MENU

key until the display

shows

RLs. (

RLS

—release) and then changes

to the current value for that setting.

Use the ▲ and ▼ keys to change the value

between the

FAST

(

FAS T

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

1kHz.

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:

Press the

SHIFT

key so that the

SHIFT

indicator

is flashing, and press the

key until the

display shows

Audio. 2--

(

AUDIO2--).

Press the

SUB MENU

key until the display

shows

OSC. ;;;

(

OSC

xxx

, for oscillator,

with the current setting).

Use the ▲ and ▼ keys to switch the oscillator

between the different settings (

OFF

(

OFF

440

(

440

), and

(

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.

Press the

SHIFT

key so that the

SHIFT

indicator

is flashing, and then press the

key until

the display shows

Audio. 1-- (

AUDIO1--

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).

Change the settings using the ▲ and ▼ keys.

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

(

1 OFF

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

OFF

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Tascam DA-78HR User Manual Page 43

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