Fourier Analysis
Additive (Fourier) Synthesis
Applying Fourier Analysis Yields a
"Frequency Spectrum"
Handy Fourier Facts:
Any waveform can be represented by a
combination of sinusoids.
But! It might take an infinite number of sinusoids.
For a digitally sampled signal of length N
It will take at most N/2 sinusoids to represent it.