@AirCraftLover There is a Fourier Transform and to use it you need the input description in math form. But there is also the Discrete Fourier Transform. It can operate on sampled data. There are a variety of fast methods and also methods that don't specifically require a fixed sample rate (much less commonly.) You do not have to have a math expression. You can just have a sequence of discrete data samples, or a 2d spread out, or 3d, etc. And complex or real data. There are other techniques to also apply for identifying signals or signal echo delays. So a broad array of tools to learn about.
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