.cue is the index file. You only need to pull the index file and audio files (lossless audio files, such as APE, FLAC, WAV, TTA, TAK, etc.) directly into Qianqian's playlist. All The song files will be displayed, select the one you want, right-click to convert the format, and select WAV output! If you want to play it on a mobile device, choose AAC, MP3 or WMA!