Win7 sound suddenly big and small how to do

  
                                    

1. Click the “Windows” icon at the bottom left of the desktop, and type “& sound” in the search box. Press Enter to select it, as shown below:

2. After entering the sound interface , select the "Communication" page to set up, as shown below:

3, change the option to "do not do anything", and then click the <quo;apply ——determine” button , as shown below:

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