Which of the following is NOT an audio file format?

The choice of JPEG as the answer is accurate because JPEG is a file format specifically designed for compressing and storing images, making it unsuitable for audio content. In contrast, MP3, WAV, and AIFF are all recognized audio file formats used for storing sound recordings. MP3 is widely used for its efficient compression, WAV offers uncompressed audio quality, and AIFF is often employed in professional audio applications for its high fidelity. Thus, identifying JPEG as an image format demonstrates an understanding of file types and their corresponding functions.