SIDE B — Make someone a mixtape again
Proudly disrupting absolutely nothing.
What it does
Curate songs, write a dedication, add a voice note, and send a mixtape to someone who matters. Before algorithms knew your taste, people did.
Before algorithms knew your taste, people did. Those were good times. Unlock premium features. Save some manatees. Feel good about yourself. A friend, a sibling, a spouse, a crush. This step is surprisingly important. Carefully select a batch of songs. Agonize over whether you've selected the right songs and placed them in the right order. Personalize your mixtape with a written note or a voice note. Or both. Or neither. Totally up to you. One click. One recipient. One potentially life-altering listening experience. Did your special someone love the mixtape? Maybe so. Maybe not. The waiting is the hardest part. Yeah, you go back Jack, do it again. Reels turnin' round andfrom sidebapp.com
Does the same job
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Hi HN, I built Eigendrum, a web tool that solves the 2D wave equation for arbitrary shapes so you can hear what they sound like as drums. How it works: * Solves -∇²u = λu using finite element analysis (Kφ = λMφ) on a triangle mesh. * Validated to <0.1% error against closed-form solutions for circles (Bessel zeros) and rectangles. * Sound model factors in strike location, Rayleigh damping, and mallet width. * Includes Kac drums I & II to demonstrate identical sound spectra from different geometries. * No frameworks, build steps, or dependencies. Repo and tests:…
Life & fun · 26d ago · baselashraf81.github.io
Launched alongside, August 2026
the whole month →- TL
Life & fun · 10d ago · louisabraham.github.io


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Hello HN! I found that picking out plausible but diverse skin tones for my digital art and game development projects was kind of difficult, and I got curious about if there was a way to define a color space that made it easy. I've built a color picker and procedural generation algorithm based on the space as well as a bunch of other fun js features and demos throughout the page that use the equations. If you find it interesting, I have lots of explanations of how I built it and what properties the space has. The methodology might be a bit shaky, but hopefully the result is as helpful for…
Life & fun · Aug 2026 · toneyalexander.github.io


I trained a 125M-parameter transformer to autocomplete piano performances in real time (~108 notes/sec on an iPhone 15). The idea is basically GitHub Copilot or Tabnine, except instead of prompting it with code, you prompt it by playing a few notes on a MIDI piano. The model then continues what you played, entirely on-device. The app is free if anyone wants to try it. Happy to answer questions about the model, training, Core ML, or the many things that didn't work.
AI · 17d ago · simedw.com