Lossless audio formats encode audio and compress it without sacrificing any data, ensuring that your music is perfectly preserved in a high-quality digital form. There are a number of lossless cd conversion formats to choose from including FLAC, ALAC, WMA lossless, and Wav. FLAC and ALAC (.m4a) files are the most popular formats to use and they typically utilize approximately 50% less hard drive space than a WAV file!