The first help during the production is to go in SSW to Menu -> Audio -> Sete AUX-IN to NONE -> then Back to the desired Input device.
To prevent this behavior Check the Sample rate for the input device before you start SSW. It must be set to 48Khz.:
1. go to the Recording devices list in Windows
2. open properties for the device selected as AUX-IN
3. Go to advanced and set Default Format to 48Khz option.
4. Click Apply in device properties, then click Apply in the Sound options.