Win7 sound card pop /noise /card delay problem solution

Recently, the sound card suddenly popped, and the music playback speed was slower, which was similar to the feeling when the DVD was read.
When playing music, run the software and quickly open 4-5 different pages of Taobao content.
If a red bar icon appears in the software, it means that the device interrupt request time is too long.
It is estimated that the win7 system interrupt request method is different from xp.
Workaround:
Step 1: Run the Registry Editor, expand to HKEY_LOCAL_MACHINESYSTEMCurrentControlSetservicesAudiosrv, double-click "DependOnService" in the right window, and then delete "MMCSS Delete" in the pop-up dialog box.

Delete MMCSS (do not delete other values)
Save the settings and exit. This modification is only the first step. To solve the problem completely, you need to proceed to the next step.
Second step, enter msconfig in the Start menu <; Search programs and files & rdquo; box, in the pop-up dialog box, switch to the "Services" tab, find and uncheck "Multimedia Class Scheduler" .

Uncheck the "Multimedia Class Scheduler"
After the modification is completed, click the "OK" button to save the settings and exit. Restart your computer so that the two-step modification described above takes effect.