User`s guide

Chapter 16: MIDI Editing 225
To configure the MIDI offset in Pro Tools:
1 Choose Setups > Preferences and click
MIDI.
2 For the “Negative MIDI Playback Offset”
option, enter the number of samples (up to
10000) for the offset.
In general, you should set the offset to a
value that is roughly equivalent to the
Hardware Buffer Size.
3 Click Done.
MIDI Offsets to Compensate for Slow
MIDI Devices
The MIDI offset in Pro Tools can also be
used to compensate for delays in MIDI de-
vices (i.e. the time it takes to trigger events
on a sampler or synth).
For instance, if you have some kick drums
that are being played by an audio track in
Pro Tools and want them to be perfectly
“in sync” with kick drums that are being
played by a MIDI device, you may need to
use a MIDI offset. In this instance, it will
usually take at least 5 ms to trigger the
MIDI notes, and it could take even longer,
depending on the MIDI device.
You can measure the latency for a MIDI de-
vice assigned to a MIDI track by recording
its audio output back into Pro Tools. Com-
pare the sample locations for the recorded
audio events against the original MIDI
notes to calculate the latency.
Stuck Notes
If you encounter stuck notes with any of
your MIDI devices, you can silence them
with the All Notes Off command.
To turn off all stuck notes:
■ Choose MIDI > All Notes Off.
An All Notes Off message is sent to each
channel for all devices in your setup.