Band Pass Filtering / Discrete Fourier Tansform

AI Thread Summary
The discussion centers on learning discrete Fourier transforms (DFT) with a focus on band-pass filtering for audio waves. The user expresses difficulty in understanding convolution and feels overwhelmed by the complexity of the subject, despite having access to a textbook, Bracewell. They seek online resources to aid their understanding, specifically in the context of using MATLAB for real-world data transformation. A recommended resource is the website dspguide.com, which has been helpful for the user in their studies. The conversation highlights the challenges faced by undergraduates in grasping advanced topics in signal processing and the desire for accessible educational materials.
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So, I'm trying to learn how to do a discrete Fourier transform, with an emphasis on band-pass filtering (for a simple audio wave)

Can anyone suggest online resources for this? My boss let me borrow his Bracewell to study the subject but I'm already lost on convolution. I'm still an undergrad (physics) and I'm starting to think I might never be able to learn this without some graduate classes.

I'm using matlab, but for now, just understanding how to build and understand the algorithms involved would be nice, considering that I'm transforming real world data and not a simple function.
 
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This has been an excellent read so far, thank you.
 

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