tempo for imported tracks???

hi guys
i just wanted to know if when importing an instrumental ( wav or mp3) do u have to set any tempo at all or can u detect the tempo of whats playing in order to record at the right tempo of for easier editing later when mixing?..quite honestly i never played with the tempo and left it at 4/4 120 ever since using Cubase (1year). but today a touch it some how an notice it changing from track to tempo and than i could change the time etc…anyways i dont make my own music for now but i know i will need it later. so what do you guys. when do we actually need it (unless when making your own music)



You can use tempo detection function. It’s better to set the tempo because of the cuts and quantization, if you need to use this.