Life & fun · alternatives · 2026

Interactive Essay on Signals, Sampling and the Fourier Transform is an educational resource designed to teach introductory digital signal processing concepts through interactive visualizations, animations, and sound.… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Interactive Essay on Signals, Sampling and the Fourier Transform launched in 2015; newer entries below may have overtaken it.

1. 1FT
   Fourier Transform Visualized via WebGL▲175

   2021 · static.laszlokorte.de · its alternatives →

2. 2
   Paper Signals by Google▲571

   Build-it-yourself objects that you control with your voice.

   2017 · experiments.withgoogle.com · its alternatives →

3. 3MC
   Markov chains explained visually▲1,070

   2014 · setosa.io · its alternatives →

4. 4
   Type Sample▲105

   A tool for identifying and sampling webfonts

   2014 · typewolf.com · its alternatives →

5. 5AI
   An interactive guide to compression basics▲256

   2017 · unwttng.com · its alternatives →

6. 6RR
   Resonate – real-time high temporal resolution spectral analysis▲76

   Last April I shared about my Resonate project here (https://news.ycombinator.com/item?id=43694157) A lot has happened since: the work I presented in much more detail at last June's International Computer Music Conference (ICMC) got best paper award. I also gave a talk at the Audio Developer Conference in Bristol last November, the video is on YouTube). This year's work, which I recently presented at this year's ICMC, starts with known techniques from the phase vocoder literature to build self-tuning filter banks that extract very efficiently the frequency components that are…

   2025 · alexandrefrancois.org · its alternatives →

7. 7HW
   Harmogram, Web Audio API + Canvas (Paper.js) FFT/Harmonograph▲105

   Harmogram is an Audio Visual experiment made by Adrian le Bas and powered by the HTML5 Audio API

   2012 · harmogram.com · its alternatives →

8. 8
   Collection of animated algorithms and data structures▲139

   Visual explanations of Algorithms and Data structures

   2020 · chrislaux.com · its alternatives →

9. 9AM
   A minimal job board for signal processing engineers▲78

   I started https://signalprocessingjobs.com/ to organize a couple of side projects I have: - a job board for signal processing engineers - Journal2MATLAB: a blog that turns academic papers into MATLAB code - some work on using cocotb for verifying DSP HDL - and some MATLAB code snippets i keep coming back to Hope others in the community find it useful :)

   2023 · signalprocessingjobs.com · its alternatives →

10. 10
    Simulation-based high school physics course notes▲295

    Interactive notes for algebra based physics with explorable explanations

    2020 · landgreen.github.io · its alternatives →

11. 11
    Wave-based non-line-of-sight computational imaging in Julia▲375

    An introduction to non-line-of-sight imaging, and how to create images of hidden objects around a corner in under 10 minutes!

    2019 · analytech-solutions.com · its alternatives →

12. 12AI
    An Interactive Guide to Teach Derivatives and Backpropagation▲119

    2023 · x0axz.com · its alternatives →

13. 13
    A minimal FFT code▲100

    2018 · lambdaway.free.fr · its alternatives →

14. 14IV
    I've built a spectrogram analyzer web app▲244

    2023 · webfft.net · its alternatives →

15. 15CE
    Computational Essay on Monte Carlo Method▲14

    2019 · observablehq.com · its alternatives →

16. 16
    Signals▲108

    Next-generation solution for algorithmic trading

    2019 · signals.network · its alternatives →

17. 17
    Fourier Video▲2

    Create stunning Fourier animations in true 3Blue1Brown vibes

    2024 · its alternatives →

18. 18
    Waveforms▲6

    An interactive, educational guide to the physics of sound

    2018 · waveforms.surge.sh · its alternatives →

19. 19
    Simple Tool to Hear and Visualize the Overtone Series▲50

    Interactive tool to understand & visualize the harmonic series in music, also known as the overtone series. Select a fundamental & hear the first 11 overtones.

    2022 · muted.io · its alternatives →

20. 20IT
    Intro to Machine Learning in Interactive D3.js Visualizations▲128

    Experiments in expressing statistical thinking with interactive design

    2015 · r2d3.us · its alternatives →

21. 21
    Signal Analysis Library Using Continuous Wavelet Transform▲36

    Complex Continuous Wavelet Transform. Contribute to Lichtso/CCWT development by creating an account on GitHub.

    2017 · github.com · its alternatives →

22. 22BI
    Beautiful interactive explainers generated with Claude Code▲43

    Hello HN, Recently an amazingly beautiful explainer was shared on HN: https://explainers.blog/posts/why-is-the-sky-blue/ I loved it so much that I wished more topics were explained that way. So, I decided to stress-test today's frontier models (Opus 4.6 in Claude Code) to generate similar explainer on any given topic WITH (almost) one shot and minimal nudging. I'm launching with four topics: Fourier transformation, scaling laws in bio, cellular automata and LLMs. I would let you be the judge, but I'm quite liking them. Some things I learned: - Prompting CC to test…

    Feb 2026 · paraschopra.github.io · its alternatives →

23. 23
    NotebookJS▲109

    Scientific computation for JavaScript

    2016 · datazar.com · its alternatives →

24. 24
    The Radial Sound Wave by SoundViz▲88

    A fresh new take on sound wave art

    2016 · soundviz.com · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →