When there were no MP3s, CDs had both convenience and good sound quality. When there were no CDs, tapes were very convenient. They were much easier to store than turntables, and the effect was no worse than ordinary turntables. They were popular at that time. For a period of time, it was almost a necessity at home, but the popularity of turntables was much lower.

MP3 was very popular due to its small size and at a time when storage capacity was still small. Of course, today's MP3s are of high quality and the effect is still good.

In terms of sound quality, CD is the best. Of course, it is also different from the decoder. It is digital information. The tape is analog, and although its sound quality is not ideal, it has its own specific taste, and many nostalgic enthusiasts still like it. Most MP3s are converted from CDs; they are just lossy compression.