Converting From Stereo to Mono While Saving ProcedureMake a stereo selection in the wave window. Select File > Save As. In the Save As window, specify a file name and location. Click in the Format field and select Edit. In the Audio File Format dialog, open the Channels pop-up menu and select one of the mono settings. For example, when selecting Mono (Mix -3 dB), the resulting audio file is attenuated by 3 dB. Click OK. Click Save.