Reference Guide

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New features in SONAR 8.5
Vista audio enhancements
Exclusive mode requires exclusive access to the audio device. Another program will not be able to
use the audio device simultaneously with SONAR.
To enable WASAPI mode SONAR
1. On the Option menu, select Audio and then click the Advanced tab.
2. In the Driver Mode list, select WASAPI.
3. Click the Drivers tab.
4. In the Input Drivers and Output Drivers lists, select the desired input and output ports.
5. Click OK to close the Audio Drivers dialog.
See also:
WaveRT updates
MMCSS task profile support
The Multimedia Class Scheduler Service (MMCSS) provides Windows multimedia programs,
including SONAR, with prioritized access to CPU resources for time-sensitive processing.
By default, SONAR uses the MMCSS task profile named Pro Audio. If desired, you can instruct
SONAR to use a custom MMCSS task profile.
To use a custom MMCSS task profile in SONAR
1. Determine the name of the MMCSS task profile that you want to use. MMCSS task profiles are
listed in the Windows registry under
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows
NT\CurrentVersion\Multimedia\SystemProfile\Tasks. Ensure that the registry entry exists for
the profile you want to use.
2. If you have added any new profiles, reboot your computer to allow the MMCSS service to see the
new profiles.
3. On SONAR’s Options menu, select Audio and then click the Advanced tab.
4. Under Configuration Settings, click Edit Config File.
The Aud.ini file opens in the default Windows text editor.
5. In Aud.ini, locate the entry called MMCSSTaskKey and set it to the the desired profile name. For
example:
Tip: If you select Share Drivers With Other Programs in Options > Audio > Advanced ,
SONAR will relinquish control of the audio device when the program loses Windows focus.
Note: The WASAPI driver mode is only available when using Windows Vista SP1 or a later
operating system.