User Manual-for Windows

CHAPTER
79
12 Performance Tips & Troubleshooting
Things seems like they are working fine, but the
Audio Express then just drops off line, and the
computer can’t see it anymore.
This is a common symptom when the problem is
that the Audio Express is not getting enough power
via its Firewire connection to the computer. Check
the power source for the Audio Express. Make sure
that the power connection meets the requirements
outlined in “Power options” on page 22.
Why does the start sound not play through the
Audio Express?
The Audio Express will only playback audio at a
sampling rate of 44.1, 48, 88.2, or 96 kHz.
The computer freezes when it starts up
If the computer is unable to boot up, it may be a
conflict with the WDM Driver. As soon as the
computer boots up, Windows will try and initialize
the WDM Driver. If this fails, your computer will
hang. To determine if the WDM Driver is the
problem, boot up in Safe Mode or remove the
MOTU Audio software with the Add/Remove
Programs Control Panel then restart. Reinstall the
Audio Express software and choose only to install
the MOTU ASIO driver, not the WDM Driver.
Restart again.
‘New hardware detected’ window
If you connect your Audio Express before running
the Audio Express Software Installer CD, Windows
will prompt you that new hardware has been
detected. Cancel this, and run the Audio Express
Software Installer, rather than allowing Windows
to locate the drivers.
Audio Express inputs and outputs are not available
in SONAR
Make sure that the inputs and/or outputs that you
want to use are enabled in SONAR.
Sound Forge and ‘Smooth Scroll’
If the Smooth Scroll option under the Options
menu is turned on, you may experience clicks and
pops or other anomalies in the audio playback.
This gets worse as you zoom in more to the
waveform while playing. For the best quality
playback, turn this option off.
Clicks and pops due to hard drive problems
If you have checked your clock settings sync cable
connections and you are still getting clicks and
pops in your audio, you may have a drive related
problem. Set the Audio Express Clock Source to
Internal and try recording just using the analog
inputs and outputs of the Audio Express. If you
encounter the same artifacts you may want try
using another drive in your computer. Clicks and
pops can also occur when the drive is severely
fragmented or the disk drivers are outdated.
If you are using a FireWire drive on the same bus as
the Audio Express, it could be that the FireWire bus
is overloaded (too many devices on the same bus).
Try removing all devices except the Audio Express.
Connecting or powering gear during operation
It is not recommended that you connect/
disconnect, or power on/off devices connected to
the Audio Express while recording or playing back
audio. Doing so may cause a brief glitch in the
audio.
Monitoring - how do I monitor inputs?
Please refer to the documentation for the audio
application that you are using. If your application
does not support input monitoring, you will need
to use the Audio Express’s hardware-based CueMix
FX monitoring feature. Please see chapter 9,
“Reducing Monitoring Latency” (page 45).