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Troubleshooting in Windows
Audible Interruptions occur on playback or record.
- Symptoms: Audible
artifacts occur within a recording and upon playback. The USBPre Control
application may also freeze.
- Cause: When the
USBPre control panel application is visible additional USB communications
occur to maintain the status of the LEDs and buttons. These communications
have nothing to do with the isochronous transfers of audio data. Technically,
they are vendor specific commands sent to the control endpoint, but if they
stall they can cause audible artifacts, including skipped audio and noise.
- Solutions: Minimize
the USBPre control panel. When the control panel is minimized to the task bar these extra communications
are disabled.
Audio recording contains random bursts of noise.
- Symptoms: With Win2000 and possibly other OS's random loud
bursts of noise will occur when recording audio. One may also experience
audio switching back and forth and additional random clicking and popping.
- Cause: Sub optimal OS system settings or Interrupt conflict.
- Solution: Optimize Win2000 for background services. Right
Click on the computer icon in the top left corner of the screen and select
Properties. Choose the Advanced tab, press the Performance Options button,
and choose to have performance optimized for background services. Click OK
to exit.
USBPre does not initialize if the Windows XP driver is installed
- Problem: USBPre does not complete initialization in Windows
XP.
- Cause: Windows XP may have installed the Microsoft USB Audio
driver instead of the USBPre Audio driver.
- Solution: Reinstall the Audio driver.
- Open the Device Manager: Select Start > Settings >
Control Panel and Double click on System. Select Hardware and then choose
Device Manager.
- Update the Driver: Under Sound and Video Game Controllers
choose USBPre Microphone Interface. Select Driver. If it is provided
by Microsoft press the Update driver button and follow the Wizard. When
windows asks which drivers it should search for choose "Display a list of
know drivers...". The USBPre should appear as an option. Select
this and click next. Click Yes in the digital signature warning window
that appears.
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