Teac X-48MKII - Manual (Page 19)

TASCAM X-48MKII
19
To set the sample rate:
Mouse/Keyboard Operation
1 Click on the Windows menu and choose Settings...
2 Click on the Sync tab.
3 Click on the Rate pull-down menu under
Sample Clock.
4 You will see the currently selected sample rate
with a check mark. Select another sample rate by
clicking on it.
Front Panel Operation
1 Press SYNC.
2 Use the
5
/
b
buttons until you see
Sample Rate.
3 Press CHNG.
4 Use the
5
/
b
buttons until you see your desired
sample rate.
5 Press ENTER/YES.
6 When
Changing Sample Rate OK?
appears,
press the ENTER/YES button.
Digital Audio Clock
When digitally connected, two or more pieces of audio
equipment must be running at exactly the same digital
audio clock rate and have their sample exactly lined up. If
this is not done, audio artifacts like clicking and popping
or completely muted audio will result.
The X-48MKII provides the ability to operate in many
digital audio clock scenarios. Each available setting is
shown below along with an example of why it may be
used. These settings are made on the Sync tab of the
Settings window.
Internal
When selected, the X-48MKII’s digital audio clock is
running on its own at the selected sample rate. Choose
this when the X-48MKII is connected to an analog mixer
or when the X-48MKII is the clock master for other pieces
of digital audio equipment.
Varispeed
The term “varispeed” refers to a recorder’s ability to run
faster or slower than a base rate. This may be used to
record off speed for later playback at normal speed for
a special effect. It can also be used to slightly alter the
pitch of a recording for tuning purposes. Varispeed is only
available when the X-48MKII is set to Internal clock. When
clocked externally, the X-48MKII must follow the rate of
that external clock.
Word Clock
When selected, the X-48MKII’s digital audio clock will be
locked to any word clock signal present at its BNC Word
Clock input. If this is selected, but no word clock signal
is present, the sample rate indication in the GUI and the
Sample Lock LED on the front panel will flash indicating
no clock lock.
Word clock is commonly used when many pieces of digital
audio gear are connected together in a system and clock
is correctly distributed from a central clock generator or
one of the connected devices.
Invert Word Out Polarity
Some manufacturers of digital audio equipment lock
to the rising edge of a clock signal while others use the
falling edge. This setting allows the X-48MKII to operate
as a clock master with either type of equipment. This may
not be documented by all manufacturers, so if your clock
configuration appears correct but you are still hearing
artifacts such as clicks, try changing the value of this
setting.
Clock Rate Multipliers
Some older word clock generators only support base
clock rates (44.1k, 48k). For scenarios where such a clock
generator is used in a system running at higher clock
rates, the X-48MKII provides the ability to lock to, and
output, word clock rates that are exact multiples of its
operating rate. For example, a system may be running at
96k, but the clock generator’s maximum output rate is
48k.
ADAT Card/AES Card (1, 2)
When selected, the X-48MKII’s digital audio clock will
be locked to the digital audio signal present at the first
group of eight inputs of a digital I/O card installed in
the specified slot. This would typically be used when
the X-48MKII is digitally connected via one of its slots to
one other piece of equipment such a mixer or another
recorder.
S/PDIF
When selected, the X-48MKII’s digital audio clock will
be locked to the digital audio signal present at the rear
panel S/PDIF input. This would typically be used when
the X-48MKII is digitally connected to the S/PDIF output
of a piece of equipment when transferring stereo audio
into the X-48MKII. On the SETTINGS screen I/O tab, set S/
PDIF output mode to Professional (Professional Mode check
box checked) or Consumer (Professional Mode check box
unchecked).
TDIF Port 1
When selected, the X-48MKII’s digital audio clock will be
locked to the digital audio signal present at the first TDIF
port (1-8). This would typically be used when the X-48MKII
is digitally connected via TDIF to one other piece of
equipment such as a mixer or another recorder.
Resolve to Video In
When checked, the X-48MKII will align the frame edge
of its timecode with the edge of the video reference
signal. This is not used as a sample clock source. Check
this box when the X-48MKII is synchronized via time
4 – Configuration