User guide

Tip #3:
1) After recording your second track/pass into Pro Tools LE Mac, adjust the newly recorded audio track to
compensate for the 164 samples of latency.
2) Select the second pass of audio with the Grabber Tool. Edit Menu > Shift. Click "Earlier" and type in 164 in the
"Samples" field. Click "OK". Now, Pro Tools will locate the audio 164 samples earlier.
3) "Shift" each track or recorded pass back by 164 samples immediately after recording. If you are stacking up
tracks, you definitely want them all to be in sync as each new one is recorded.
4) If you recorded your audio at the very start of the session, you will have to trim in the audio before the
waveform starts to allow space for the audio to be shifted 164 samples ahead.
Now, you may ask, are all other passes 164 samples apart from each other too?
Not exactly, each recording pass will be 164 samples behind everything already recorded. If you record one track at
a time, and mute recorded tracks as you go along so you're only listening to the most recent track, then yes, your
final track (say, 24) will be 23 x164 samples behind the first track, at least in terms of what you're hearing.
Technically, the last track is still only 164 samples behind the first track but listening to these delays building up will
cause your playing in time to the tracks to start falling behind noticeably.
So if you add one track at a time and listen to all previous tracks on each recording you'll be hearing:
Track 1: On time
Track 2: 164 samples behind Track 1
Track 3: 164 samples behind Tracks 1 and 2, so play in time to Track 1 you're off by 164 samples, but if you play in
time to Track 2 you're 328 samples off.
Track 4: 164 samples behind Tracks 1, 2, and 3, but the delays build up differently depending on what track you
play off of.
Mbox Index | All FAQ Index
[7771]
CPU usage is holding off USB audio -9136 when running Pro Tools LE 5.2 on Mbox.
- Lower the CPU usage to 65% or lower in Pro Tools LE (Setups menu/Hardware window).
- Update Mac OS to 9.2.2 (this error is more common with 9.1).
- Remove RTAS Plug-Ins, since they take more Host time.
- For Apple laptop computers when using the battery:
Adjust the battery usuage of an Apple laptop computer: Apple Menu > Control Panels > Energy Saver. Under
"Advanced Settings" there are three checkboxes that effect system performance. Uncheck three items in "Other
Options": "Allow processor cycling", "Reduce processor speed", and "Increase application idle time". All of these
settings have a dramatic effect upon performance of Pro Tools LE on a laptop.
Mbox Index | All FAQ Index
[7727]
Getting pops and clicks written in the audio when recording with Mbox.
Mbox users reported getting pops and clicks when recording Pro Tools LE sessions over a half hour.
Digidesign has developed a new USB driver that solves this. To obtain the new Digidesign USB driver go to: www.
digidesign.com > support > downloads > Mbox > download the Digidesign USB driver v. 1.0.1
This driver should replace the Digidesign USB driver in the Extensions folder on the Mac Hard Drive.
Mac Hard Drive > System folder > Extensions folder.
Mbox Index | All FAQ Index
[7432]
What happens when my computer goes to sleep while using the Mbox?
Peak Indicators on the Mbox may light when the computer goes to sleep. Additionally, be sure to turn off Mbox's
48V Phantom Power when the computer is in sleep mode.