音频驱动程序的接口 (Interface to audio driver)

请教如下。

谁做过任何与设备的音频驱动程序（如windows或mac上的笔记本电脑）进行编程接口的事情，以逐渐减少音量。。
Has anyone done anything to programmatically interface with the audio driver of one's device (be laptop on windows or a mac), 
for instance, to gradually reduce the volume...
多谢。