human
What is the difference between a cd and a mp3?
assistant
The main difference between a CD and an MP3 file is their physical size. CDs are much larger than MP3s, typically ranging from 700MB to 1.5GB in size. A CD can also be played on most audio players, while an MP3 needs specialized software or hardware. Additionally, CDs generally offer higher quality sound than MP3s due to their higher sampling rate.