You can do the conversion easily with iTunes (available for Mac/Windows). If you have your music in iTunes already, this will be super fast to convert multiple files! 

You can download iTunes from the Apple website.

If you have Windows 10 or 10 S (for education), you can download a native Windows 10 version from the Microsoft App Store. For Windows 10 S this is the only version that may work. If you are having trouble downloading a Windows 10 version not from the Microsoft store, you might consider downloading this version from Apple, then upgrading.

Once you install and run the program, you'll have to set the preferences first, but you only have to do it once.

Step 1: Set Preferences

The settings depend on what version of iTunes you are running:

• For older versions, Go to the Advanced -> Importing tab. Make sure it is set to 22KHz (or less), 16-bit (or less) and Mono channels. Click OK.

• For newer versions like 12.1 and later, go to the tiny square in the upper left hand corner, left click with your mouse, and then click Preferences

Then click the Import Settings button under General:

Then click Import Using: WAV Encoder, Setting Custom. In the new popup window, select Sample Rate: 22,050 kHz, Sample Size: 16-bit, Channels: Mono.

Step 2: Convert

Older versions: Search for your file. then select Convert Selection to WAV from the menu.

For newer versions without a menu, right click the file you want and select Create WAV Version

Step 3: Copy Your Files

Simply drag the wav copy of the sound files onto an SD card, your hard drive, or desktop.