The Duo, MME, and Your Music Program

3.Power down the Duo, then power it back up. This will reinitialize the Duo.

4.Go to Start Settings Control Panel Multimedia, and set the playback (and record) device to “USB Audio Device.” Click Apply, then click “OK” to close.

There’s no need to change the setting for your Windows Sound System M-Audio device, should you choose to use the ASIO or EASI drivers in a music application, even though you will be using the USB Audio Configuration Manager in the “ASIO/EASI” setting. However, you will no longer be able to hear the system sounds through the Duo since the Windows MME driver is deactivated (see previous section).

If primarily using the ASIO or EASI drivers, you may want to set the Windows Sound System to your internal soundcard or some other audio device that already exists in your system. You will need to monitor that soundcard or audio device separately from the Duo. If your computer does not contain an audio device other than the Duo, you may simply leave the multimedia audio setting to “USB Audio Device.”

The Duo, MME, and Your Music Program

Some Windows-based music programs utilize only the Windows MME (multi-media extensions) drivers, and are not ASIO or EASI compliant. The Duo’s MME drivers use the “WDM” model, which make them compatible with

the latest software technology.

A music program such as Cakewalk’s Sonar takes full advantage of the WDM driver model, and can achieve extremely low latency when using their “Input Monitoring” feature. Sonar’s Input Monitoring will allow you to monitor your signal at the software inputs, allowing you to add software effects while monitoring. Check your Sonar manual for more information.

To operate your Duo using the MME drivers and a music program, follow the instructions in the previous section, then enable the “USB Audio Device” as your input and output devices within your music program’s audio setup page, and/or run your program’s audio device profiling utility to analyze the new audio device

in your system. At the time of this writing, it is important to follow these steps when using Sonar:

1.In the Audio Options menu, under the “Advanced” tab, make sure that the checkbox, “Always Use MME Interface, Even When WDM Drivers Are Available,” is UNCHECKED.

2.In the Audio Options menu, under the “Driver Profiles” tab, make sure that "Stream > 16 bit data as:" is set to 3 bytes.

ASIO/EASI Operation

If your music program is ASIO or EASI compliant, you will want to use these drivers with your Duo. The ASIO and EASI drivers for the USB Duo install