Answer:
Assess the time signature. The time signature looks like a fraction and is noted at the beginning of a piece of music.
Identify the key. ... If there are no sharps or flats next to the clef, the scale is C major or A minor, so C or A...
Listen to the root note. Unless you have perfect pitch, you'll need to listen to the root tone.
Step-by-step explanation:
This goes for any piece of music.