Programmable Meters; Word Out; Sync Cuemix Audio With Video Output; General Tab Settings - MOTU V4HD User Manual

connected to the V4HD's analog audio outputs.
Even though audio and video depart the V4HD
outputs completely in sync with one another, the
image on the plasma will be running one frame
behind the audio you hear from the studio
monitors. Use the Additional Audio Delay option
(Figure 8-1) to delay the V4HD's audio output by
one frame to match the image on the plasma.

Programmable Meters

This option lets you choose which bank you wish
to monitor with the eight programmable meters on
the V4HD front panel. Choices are: analog out
(analog in has its own dedicated bank of meters),
ADAT Optical in/out, AES/EBU in/out, SDI in and
SDI/HDMI out.

Word Out

The Word Out menu (Figure 8-1) appears when the
V4HD is operating at a 2x sample rate (88.2 or
96kHz) or 4x sample rate (176.4 or 192kHz). This
menu lets you set the word clock output either to
match the current sample rate (System Clock) or
force it to the corresponding 1x rate (either 44.1 or
48kHz). For example, if the V4HD were operating
at 176.4kHz, choosing the Force 44.1/48kHz option
would produce word clock output at 44.1kHz.

Sync CueMix audio with video output

When the V4HD passes video and audio signal
from its inputs to its outputs, there is a small delay
in the video signal, while it is being processed and
converted. Audio has almost no delay at all (less
than a millisecond), which means that it will play a
little bit ahead of the video signal. When you check
the Sync CueMix audio with video output option
(Figure 8-1), the V4HD precisely calculates the
difference in the two signals (down to one audio
sample) and delays the audio by exactly the correct
number of samples to bring the audio signal back
in sync with video when the two signals leave the
V4HD outputs.
M O T U A U D I O S E T U P
So, if the V4HD's CueMix audio doesn't sound in
sync with the current video signal being
monitored, try checking this option. If it still
doesn't seem in sync, the most likely culprit is an
inherent delay in your video monitor. The V4HD
allows you to further compensate for external delay
such as this. See "Additional Audio Delay" on
page 76.

GENERAL TAB SETTINGS

Launch MOTU Audio Setup when hardware
becomes available
Check this option if you would like the MOTU
Audio Setup icon to appear in the application dock
as soon as a MOTU interface is detected (switched
on, plugged in, etc.)

Edit Channel Names

Click the Edit Channel Names button to open the
Channel Names window (Figure 8-4). This
window lets you edit the names of the V4HD inputs
and outputs, as they might appear in your host
software (if it supports channel names). For
example, when you click on a menu that displays
the V4HD inputs (or outputs), you will see the
names you specify in this window (e.g. "camera
input", "VTR input", etc.), instead of the default
generic names ("Analog 1", "Analog 2", etc.)
☛
Not all Mac OS X audio software supports
channel names. If not, you'll see generic port
names in your host audio software, or no names at
all.
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