I am very new to DSP, so excuse my ignorance.
Using Audacity, I generated a sine wave of:
- frequency 440Hz
- amplitude: 0.8
- duration: 1 minute
Now when i plot the spectrum for this sine wave, I get an image like this:
This is really surprising for me.
I was expecting a single surge at 440 Hz for the pure tone. But this is entirely different. Sure this is not anything to do with noise. Right ?
How can the spectrum of a pure tone have so many frequency components in the spectrum.
What obvious am I missing ?