What is a common format for saving digital audio files?

The common formats for saving digital audio files are WAV and MP3 because they are widely recognized and frequently used in the industry. WAV files are known for their high sound quality as they are uncompressed, making them ideal for professional audio work, while MP3 files are compressed, which allows for easier storage and streaming without significant loss in quality. Their compatibility across various platforms and devices further contributes to their popularity among users, making them the most familiar choices for digital audio storage.