[Driver] Make the per-channel volume control more consistent.If you encounter any issues after installing the driver update, please report them in the IMG forum thread linked below. The M-Audio team is constantly monitoring it for feedback on their product. IMG will have an in-depth review of the Revolution 7.1 in the near future.
[Decoders] Downmixing support without surround decoders. Send center to the front left/right if there is no center speaker; send LFE to the front if there is no subwoofer.
[Control Panel] Fix random muting problem (only seemed to manifest on 10.1.5).
[Control Panel] Use CoreAudio format, not nominal sample rate, which doesn't work on 10.1.5.
[Control Panel] SRS Dialog Clarity and SRS TruBass require a surround sound decoder to be enabled, so change the UI accordingly.
[Control Panel] Allow the “QuickSwitch sets” bar to be hidden via the toolbar button in the window title bar. [N.B. The animation during show/hide is not currently very smooth.]
[Control Panel] Workaround for audio glitch at launch time. Audio now briefly mutes during launch.
[Device Helper] Workaround for bug in System Preferences: at the first startup after the software is installed/upgraded, delete the system prefpanes cache to force the System Preferences to notice our new pref pane.