Which is the cause of the songs magnetic properties
The cause of a song having magnetic properties is likely a misunderstanding or a miscommunication. Songs are audio recordings or compositions, which are typically stored digitally or on physical mediums like CDs or vinyl records. These mediums do not possess magnetic properties themselves.
However, if you are referring to the magnetic properties of the storage medium where songs are stored, such as magnetic tape or hard drives, then the cause is related to the way information is stored and retrieved using magnetic fields. In these cases, audio signals are converted into digital data using a process called analog-to-digital conversion. This digital data is then represented as magnetic patterns on the storage medium, which can be read back using a magnetic read head.
So, to clarify, it is not the songs themselves that have magnetic properties, but rather the storage mediums used to store and retrieve the songs.