The M-Audio Micro DAC is a USB digital-to-analogue converter with two outputs, one analogue and one digital (optical) and a sampling rate of up to. The M-Audio Micro Track II uses Compact Flash memory cards. We stock memory from SanDisk, Samsung, Lexar, and MyMemory. We also offer a wide range of. How to replace the non-user-serviceable battery in an M-Audio microtrack. Full description with detailed pictures and how to tips. This site has no affiliation with.