How do I find the frequency of a WAV file?
Find a WAV file's sample rate in Windows by right-clicking the file, then clicking "Properties." In the window that appears, look under "Audio Format" for a set of details including a number expressed in kilohertz (kHz): This is the sample rate.
How do I change the kHz on a WAV file?
In the General Preferences tab, click on Import Settings, located towards the bottom. Click on the menu next to Import Using > WAV Encoder. Then click to change Setting > Custom and a new window will open. In the WAV Encoder window, change the Sample Rate to 44.100 kHz and Sample Size to 16-bit.