ThinkDSP VS NAudio

There's a free book online called Think DSP that teaches you how to design and visualize filters in Python: https://greenteapress.com/wp/think-dsp/

https://greenteapress.com/wp/think-dsp/

It can be bought, but is available for free. Code is also available via GitHub. It uses Python and Jupyter.

"The premise of this book (and the other books in the Think X series) is that if you know how to program, you can use that skill to learn other things. I am writing this book because I think the conventional approach to digital signal processing is backward: most books (and the classes that use them) present the material bottom-up, starting with mathematical abstractions like phasors."

How about Think DSP: Digital Signal Processing in Python - https://github.com/AllenDowney/ThinkDSP

My application is signal processing and tried to reproduce parts of https://github.com/AllenDowney/ThinkDSP in C++. https://gitlab.com/cpp8/thinkdsp.git and supplemented with some others. Documentation in https://github.com/RajaSrinivasan/assignments.git

Think DSP

Thanks for the suggestion. I have to rewrite most of the audio signal processing code anyway as I am using NAudio currently. Have heard of PiSound before, and will definitely check it out as it is pretty popular. I just need a way to output an array of numbers, representing the processed sound wave, to turn into an analog signal. Writing this from scratch is unnecessarily complicated when these libraries already exist.

https://github.com/naudio/NAudio/blob/master/NAudio.Core/Dsp/BiQuadFilter.cs Simple formulas for all major types of filters

Not tried it but there is also NAudio (https://github.com/naudio/NAudio)

I’ve used NAudio for this. You get Windows support for free, and it’s not too difficult to implement for other platforms. I have gists published for Android and iOS that should get you going.

This might help: NAudio, they have a doc file for working with pitch here

Hello. I'm working on a school assignment where I'm creating an application where the user can play .wav files slowed down to 0.5 speed. I'm using Naudio and Varispeed to accomplish this. There is a varispeed demo that shows how to do it and from what I can tell, I'm doing more or less the exact same in my code as the demo. But the wave file is played in the normal speed anyways. Does anyone have a clue on what I'm doing wrong?