[AK 1st generation model: AK100 / AK120 / AK JR]

Supported codecs: WAV, FLAC, AIFF, ALAC, (Not MP3)

Conditions: The sample rate, bit, and codec of the current playback song and the next playback song must be the same.

[AK model except for 1st generation. (Android OS)]

Supported codecs: All playback supported formats

Conditions: The sample rate, bit, and codec of the current playback song and the next playback song must be the same.