Mac OS X - Problems with MIDI devices after an update.

Troubleshooting USB MIDI devices on Mac.

Troubleshooting Class-Compliant USB Devices.

If you require further assistance with product setup or have determined that the product is NOT functioning correctly, contact the Technical Support team or refer to some of the related articles below: Technical Support: The suggestions above should help you quickly determine if a product is functional, and to help you overcome common setup obstacles. That's it! This will prevent your computer from disabling or power cycle USB ports, which can potentially interrupt your music playback or recording unexpectedly. Click the + button to drop down the USB selective suspend setting.

In the Power Options window, scroll down to USB Settings.

Note: Changing the Put the computer to sleep option to Never as shown above may also help to alleviate USB disconnection issues.

From the Start Menu, open the Control Panel.

This article walks through steps to minimize the possibility of these symptoms. For those connecting USB audio and MIDI devices, this can mean pops/clicks/glitches that randomly occur in the audio, or a sudden loss of connection all together. Many computers running the Windows 7 operating system have power saving features which may attempt to disable the computer's USB ports.

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