Astell&Kern natively supports MQS, which is closest to the original sound that the recording artist intended. Mastering Quality Sound (MQS) is an acronym describing the collective lossless and high-resolution source formats that typically come encoded with 24-bit, 44 to 192kHz bit/sampling rates. Since MQS delivers about 6.5 times more detail than a conventional CD, listeners can enjoy a more realistic music experience.