DigiDesign Pro Tools, Справочное руководство

Страница: 593 / 886

Chapter 25: MIDI Editing 579
To enable Note Chasing for a MIDI track:
■
Click the track’s Playlist selector and select the
option for Note Chasing.
Make sure to disable Note Chasing when work-
ing with samplers that are playing loops. If a
MIDI track, for example, is triggering a 4-bar
drum loop and you begin playing at bar 3, the
loop will begin playing at the wrong time and be
out of synchronization with the other tracks.
Controller and Program Chasing
Pro Tools always chases continuous controller
events and program changes for MIDI tracks.
This ensures that controller values and patches
for MIDI devices are always appropriately set.
For example, suppose a MIDI track lasting 32
measures starts with a volume of 127 and in the
last bar fades the volume down to 0. If after
playing the track in its entirety you attempt to
play from bar 8, the initial volume of 127 is
chased and sent to the track’s assigned device—
otherwise the track would not be heard since the
most recent volume event sent would have
been 0.
Chasing also occurs for a MIDI track’s default
program change, along with any program
change events residing within the track. There-
fore, if you have chosen a default program
change for a track, when playing from any point
within the track, the program change event is
sent to the track’s assigned device.
Default Controller Values and Chasing
Though new MIDI tracks appear to have default
values for continuous controller playlists, this is
actually not the case. For example, when view-
ing a MIDI track’s Mod Wheel playlist, you’ll see
that the breakpoint line is set to a default of
zero. However, since the modulation wheel on
your synth may purposely be set to a different
value, the default value in the track is not trans-
mitted when playing.
For example, if you insert a Mod Wheel change
from 0–90 towards the end of the track, and you
then play from the beginning of the track, or
from anywhere before the change, the Mod
Wheel value remains at 90 until the 0 value is
reached, which is likely not what you want.
To ensure that the default controller value for a
playlist is sent (and chased), click the initial
breakpoint at the beginning of the track, move
it slightly, and set it back to the default value.
Note Chasing enabled in Playlist selector