In Windows 7 the lesser used devices including the WaveOutMix, MonoMix, StereoMix are disabled by default. If your your sound driver supports this feature, you can enable it.
Microsoft Hardware has recently announced that its current line of award-winning mice, keyboards, LifeCams, gaming devices and notebook accessories will be fully compatible with Windows 7 once the operating system is launched to retail customers on Oct. 22, 2009. Making [...]
In general, if your PC can run Windows Vista, it can run Windows 7. But if you’re not running Windows Vista, or are just not sure if your system is ready to run Windows 7, there’s a quick way to [...]
Microsoft is also providing guidance on the minimum system requirements for Windows 7, showing that Windows 7 will work on a broader array of hardware than any other release of Windows at launch.
Windows 7, like Windows Vista, includes most, if not all of the device drivers for common hardware. All you you have to do is plug in the hardware and the drivers will install.