Time-frequency analysis for music signal

Time-frequency analysis is like looking at a picture that changes over time. Imagine someone drawing a picture and showing you each part of the picture as they draw it. That's how music works too, it's like a picture being drawn with sound.

But sometimes, we want to see more detail in the picture. We want to know what sounds are being made at each moment in time, and also what frequencies (or notes) are being played. That's what time-frequency analysis does for music.

It breaks down the music into very small pieces, called "frames", and looks at each frame to see what notes are being played (the frequency) and when (the time). This helps us understand the different parts of the song and how they all fit together.

Think of it like putting together a puzzle. Instead of trying to do it all at once, we look at each piece (frame) carefully to see how it fits into the bigger picture (the song). That's what time-frequency analysis is all about for music!