The H1 records audio in two different basic file types: WAV and MP3. The main difference between the two is that WAV files are uncompressed; that is, they contain all the recorded signal without any data being removed. The WAV files recorded by the H1 can be either 16- or 24-bit, with sampling rates of 44.1, 48, or 96 kHz, and are automatically time-stamped, making them Broadcast Wave Format (BWF) compliant—especially important when recording audio for video since it allows for precise synchronization in post-production.
MP3 recordings are compressed, which means that some unnecessary data is removed prior to storage, making them much smaller than WAV files, and thus much easier to upload and download. Some MP3 files exhibit a slight loss of audio fidelity as compared with the original signal; however, this is not noticeable in all circumstances.