There are two different modes for AIFF and WAV files - little endian and big endian. This has to do with the way files are stored in binary- whether the least significant bit is left-justified or right-justified in the memory registers. Some editors let you chose which one you want. Little endian is the proper choice for Macintosh files and big endian is proper for Windows. If the wrong one is chosen the result is a dense, distorted and unusable file on the opposing platform. Importing audio using a professional audio application should create and store it in the proper file format.