https://ccrma.stanford.edu/~jos/mdft/Chapter_Outline.html https://ccrma.stanford.edu/~jos/mdft/Chapter_Outline.html interesting looking page. compared to ctcf,

https://ccrma.stanford.edu/~jos/mdft/Chapter_Outline.html https://ccrma.stanford.edu/~jos/mdft/Chapter_Outline.html interesting looking page. compared to ctcf, there is a lot of cool math that pops out in the dtdf case (sampling, aliasing, etc). also it's fundamentally how we deal with audio in computer systems so this is highly practical info. it is also fun to look at the various other discrete flavors of signal processing. https://ccrma.stanford.edu/~jos/mdft/Fourier_Transforms_Continuous_Discrete_Time_Frequency.html https://ccrma.stanford.edu/~jos/mdft/Fourier_Transforms_Cont... you can even extend this to finite algebraic structures. I think most fourier analysis references will have some information as there is relevance to Dirichlet theorem on primes.