Why do some songs have different keys in them?

Can a song have different keys?

Commonly, songs can use two keys: the main key, and then a modulation to a key that is a 5th apart. For instance, starting a song in C major but having a section that goes to G major (G is the 5 chord in the key of C) and then returning to C at the end.

Do songs have to be in the same key?

No, it's not necessary for a song to be in the same key throughout, though key shifts can come across as gimmicky.

Does the key of a song matter?

Originally Answered: In music, why does the key matter? Today, key doesn't really matter. People can have very good relative pitch but very few have perfect pitch, so the key the piece is written is isn't really important to how you perceive the music.

Does key make a difference?

Some listeners and composers say the different keys have distinctly different sounds and effects. Different singers like to sing songs in different keys. Also, different keys have a different vibe. White Keys like C, G, D, A, and E tend to have a bright, uptight, and very white feeling.