Specifications

Chapter 1: Working with MIDI Control Surfaces 9
Toggling Input Status
You can toggle at any time between Auto Input
Monitor and Input Only modes by pressing Op-
tion+K (Macintosh) or Alt-K (Windows) on your
computer keyboard.
“Pass Through Null” Fader
Automation
In order to activate automation recording in the
Touch or Latch Automation modes, the fader or
other control must first match or “pass
through” the current automation playlist value.
In the Touch and Latch Automation modes, the
auto-matching LEDs on individual channels in
the Mix window indicate which direction a
fader needs to be moved to match the current
automation data.
When fader position and data match, the track
will begin writing automation and will stop
writing automation when you stop moving the
fader and the Touch Timeout has expired
(Touch mode), or when playback stops (Latch
mode). You do not have to manually “null” the
fader to match the preexisting automation level
at the punch-in point before playback begins.
Automating Switched Controls
When automating switched controls (such as
mutes or plug-in bypasses), automation data is
written for as long as the switch or button for
that control is pressed or touched.
For example, if you have just written a series of
mute on and off states in quick succession on a
channel, the manual method for clearing this
automation data would require you to move to
the Edit window, choose automation playlist for
Mute, select the mute automation data, and de-
lete it.
In Pro Tools, you don't have to perform all of
these steps. Instead, you can perform another
automation pass on the track and press the
Mute switch when it reaches the state you want
to keep. As long as you keep the Mute switch de-
pressed, Pro Tools erases the underlying
changes in mute state that occur until you press
Stop.
This pass-through-null feature does not ap-
ply to the Mackie HUI. The HUI has touch-
sensitive faders that will overwrite automa-
tion data as soon as they are moved, and
the MM-16 and DC-16 use continuous belt
controls, where the relative position of the
faders always matches the automation
playback level.
Triangular AutoMatch LEDs on a channel strip
AutoMatch LEDs
The Peavey PC–1600 can cause automa-
tion recording and playback to become in-
accurate during rapid fader moves. This is a
limitation of the PC–1600. The Peavey con-
troller samples its fader movement at a
fairly low rate that can sometimes cause it
to miss fader positions used for nulling.