MOTU micro express-USB, User Manual

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U S I N G M I D I T I M E P I E C E A V C O N S O L E
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The setup list will always contain the eight factory
Base setups. Selecting a setup from the list with the
mouse will cause the MIDI Timepiece AV to
change to the selected setup. You can also use the
keyboard up and down arrow keys to scroll
through the list, pressing Enter to select the desired
setup. Alternately, you may use the MIDI
Timepiece AV’s front panel LCD controls to change
setups. At all times, the Console should remain “in
sync” with your MIDI Timepiece AV, accurately
displaying the current setup configuration.
The SMPTE readout
To the right of the Setup list is the SMPTE readout.
The SMPTE readout always gives a real time,
running update of the current frame time and
frame rate when your MIDI Timepiece AV is
converting or generating SMPTE timecode.
Figure 10-4: The SMPTE readout. in the toolbar Sync display.
Below the SMPTE readout is the SMPTE error list.
This list will display any “dropouts” and MIDI
errors encountered while converting incoming
SMPTE. Each dropout will be shown with the last
valid SMPTE time converted before the dropout
occurred and the number of frames missing after
that time. The list will be cleared each time new
timecode begins. Hopefully, you will not see too
many entries appear in this list. However, if you do,
the MIDI Timepiece AV has a flexible SMPTE free-
wheeling (“jam-syncing”) capability to smooth out
problem sync tracks (you can also use the MIDI
Timepiece AV as a SMPTE regenerator/reshaper to
re-record or extend sync tracks).
For more information about the rest of the toolbar
Sync display, see “Toolbar sync display” on
page 97.
ExpressHelp
You’ll also notice a bar along the bottom of the
main Console window. This is the status bar where
notification and progress messages will be
displayed from time to time while the Console
performs its various functions. In addition,
another feature of the Console uses this area for
displaying “ExpressHelp”. ExpressHelp consists of
short, informative messages that change
depending on which Console control (button, list,
etc.) the on-screen mouse cursor is on top of.
ExpressHelp will also update if you shift the control
focus using the Windows keyboard interface (using
the Tab key in a console window, for example)
instead of using the mouse.
ExpressHelp is enabled by default to aid you in
getting familiar with the Console, but you may
disable it with the Options menu selection.
MIDI TIMEPIECE AV MIDI PROCESSING
Before going any further, it is important to
understand how the MIDI Timepiece AV performs
its MIDI processing, specifically the order in which
each type of processing is applied. The following
diagram illustrates how the Timepiece AV
processes MIDI data as it travels from one interface
input port to one interface output port.
First, data is received from an input port, where it is
immediately filtered (events that are filtered are
removed). Next, the remaining events are
channelized (“mapped”) to different channels (the
default is no channelizing) and then they are sent to
the “data bus”. The data bus is where port-to-port
routing takes place, sending MIDI data from each
input to any combination of outputs. When the
data finally reaches its destination output port(s), it
SMPTE frame rate
hours minutes seconds frames
!USB Interfaces Manual Book Page 85 Tuesday, October 10, 2000 12:43 PM