Tascam DA-98HR User Manual download pdf (Page 32)

100

6 – Basic Operations–Formatting a tape

32 TASCAM DA-98HR

NOTE

If varispeed is set to on (7.5, “Vari speed (pitch control)”) or

FS shift is selected (9.4.1, “Pull up and pull down (Fs

shift)”, the clock source is set to the same as the Wide set-

ting (i.e. the LC oscillator), regardless of what settings are

made in this menu.

6.2 Formatting a tape

Before you use a tape in the DA-98HR, you must

first format it. This marks internal synchronization

patterns for the servo to follow on subsequent passes

through the tape as well as the subcode data (ABS).

No audio data is normally recorded during a format-

ting operation (but see below).

When formatting, the tape is prepared for use in HR

(high-resolution; 24-bit) or normal mode (16-bit res-

olution).

The formatting operation also determines the sam-

pling frequency or sampling frequencies that will be

used on the tape, and hence, the number of available

tracks (see 6.2.1, “Available tracks” below).

While formatting is proceeding, you cannot perform

any other transport operation except stopping the

tape.

You cannot change the sampling frequencies or the

recording resolution while formatting is in progress.

NOTE

Once you have started to format a tape, it is strongly sug-

gested that you allow the format process to continue to the

end of the tape. Changing the sampling frequencies, the

number of tracks, or the recording resolution in the middle

of the tape will almost certainly lead to problems later on.

Even if you do not change any of these parameters, but

stop and start the tape in the middle of a format process,

there will be a discontinuity which will produce unpredict-

able results if you attempt to record over it.

6.2.1 Available tracks

Because of the way in which the DA-98HR records

tracks at sampling frequencies which are different

from the base frequency, the number of tracks which

are available for recording varies according to the

sampling frequency selected.

The

AVAILABLE TRACK 8 indicators above each

track meter show the current status of the corre-

sponding track. When the indicator is unlit, the track

is not available for use. When red, the track will be

recorded at four times the base sampling frequency

(quad-frequency), when orange at twice the base

sampling frequency (dual-frequency), and when

green, at the base sampling frequency.

The different combinations of available tracks are as

follows:

These combinations are selected as explained below

in 6.2.2, “The format process”.

Note that all sampling frequencies are related to a

base frequency, which may be either 44.1 kHz or

48 kHz. It is not possible to mix sampling frequen-

cies based on different base frequencies on the same

tape.

All track combinations other than the eight base-fre-

quency track combination must be in HR (24-bit)

mode. It is not possible to make 16-bit dual or quad-

frequency recordings using the DA-98HR

NOTE

See 7.10.3, “Setting the high-frequency AES/EBU I/O

transfer mode” for details of how to output high-frequency

AES/EBU data.

6.2.2 The format process

1 Switch on the DA-98HR and load a tape into

the tape loading slot

2. As the tape is loaded

and threaded, the tape counter shows

--LOAD--.

For details of tapes that you can use in the DA-

98HR, see 1.5, “Recommended tapes”.

2 Press

REW T to take the tape to the beginning.

When the beginning of the tape is reached, the

tape counter shows

BoT (“beginning of tape”).

3 Press the FORMAT/Fs key 7. The indicator

starts blinking. Press the

FORMAT/Fs key

again within five seconds. The indicator then

lights steadily.

If you do not press the

FORMAT/Fs key twice

within five seconds, the indicator goes out. This

is a feature designed to stop you formatting a

tape accidentally.

Track

12345678

4x 4x ——————

2x 2x 2x 2x ————

2x 2x 2x base base ———

2x 2x base base base base ——

base base base base base base base base

1 2 ... 27 28 29 30 31 32 33 34 35 36 37 ... 99 100

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Tascam DA-98HR User Manual Page 32

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