When the QQ or MSN under Win7 comes to the message, the player sounds smaller?

Users who use windows7 find such a problem. When watching movies or listening to music, if QQ or msn comes to the message, the volume of the movie or music will suddenly become smaller, making the qq prompt sound particularly harsh.
In fact, this is a new feature design of windows7, the intention is to avoid users being too immersed in music or movies and ignoring other information. Users have mixed views on this more user-friendly design. If not, we can remove this feature by setting it.
The setting method is as follows:
Right click on the speaker icon on the system tray, select “ld” in the pop-up menu, open the “sound” window, and switch to the “Communication” label. (communications), open the drop-down box, and "when windows detects communication activity" is set to "do not perform any operations".
This has successfully removed this feature, and the qq message will not affect the player's voice.