In fact, they all represent the music quality of a song, among which HQ stands for high quality, SQ stands for super quality, almost lossless music, and lossless is the best music format. Without these words in front of the song, the quality of the song is average. You don't need to explain the MV. That's a video.

In fact, the difference between HQ and SQ is not very big, which basically has no effect on our listening to songs. Except for some music enthusiasts or great gods in this field, most people can't hear the difference. The meaning of lossless is very different. We often see the lossy compression of MP3, WMA and OGG. As the name implies, lossy compression is to reduce the audio sampling frequency and bit rate, and the output audio file will be smaller than the original file. Another kind of audio compression is called lossless compression, which can reduce the volume of the audio file on the premise of 100% saving all the data of the original file. After the compressed audio file is restored, it can reach the same size and bit rate as the source file. At present, the common and mainstream lossless compression formats are APE, FLAC, TTA, TAK and WAV.