Emotive Engine – Animation engine with musical time (not milliseconds)

Hacker News

Hey HN! I'm the creator of Emotive Engine. I've been working on this for 2+ years and finally open-sourced it today. The core idea: Most animation libraries work in milliseconds. Music works in beats. This creates a mismatch - hardcode a bounce for 500ms (perfect at 120 BPM), switch to 90 BPM, and everything drifts because 500ms is now 0.75 beats. Emotive Engine uses musical time as the atomic unit. Specify animations in beats, and they automatically become: - 500ms at 120 BPM - 667ms at 90 BPM - 353ms at 170 BPM Change tempo, everything adjusts. No recalculation needed. Built for AI interfaces (chatbots, voice assistants) but works for any real-time character animation. Pure Canvas 2D, 60 FPS on mobile, 2,532 tests passing. Live demo at https://emotiveengine.com/demo - the hero banner on GitHub was generated with the engine itself. Happy to answer any technical questions! MIT licensed.

Visit product View on Hacker NewsOct 29, 2025

Share card

Actual performance

6points

2comments

Did not reach leaderboard

Launch Intel predictions

Analyze your own launch →

Indie HackersFits the IH revenue-focused audience · Missing: supports, reddit linkedin, podcasting

80%80% predicted probability of success on Indie Hackers, based on ML models trained on real launch data.

Hacker NewsStrong engagement from HN community · Strong signals: ide, io · Missing: https docs, excited, just released

76%76% predicted probability of success on Hacker News, based on ML models trained on real launch data.

nativeThis product was originally launched on this platform.

Product HuntOn track for Day 1 leaderboard · Strong signals: code, open · Missing: mac, agents, macos

73%73% predicted probability of success on Product Hunt, based on ML models trained on real launch data.

AppSumoMay struggle as an AppSumo deal · Strong signals: interface · Missing: plus, platform, intuitive

33%33% predicted probability of success on AppSumo, based on ML models trained on real launch data.

TrustMRRLess likely to generate early MRR · Missing: mobile apps, ios, personal

29%29% predicted probability of success on TrustMRR, based on ML models trained on real launch data.

Acquire.comPre-revenue stage for this audience · Missing: arr, mrr, revenue

20%20% predicted probability of success on Acquire.com, based on ML models trained on real launch data.

BetaListMay not resonate with beta-testers · Strong signals: chat · Missing: web3, crypto, cryptocurrency

1%1% predicted probability of success on BetaList, based on ML models trained on real launch data.

Incorrect prediction on native model

Similar products

Manim (3Blue1Brown's animation engine) in the browser via WebGPU55%Launch Intel prediction score: how likely this product is to succeed on its source platform, based on its name, tagline, and description.

Manim (3Blue1Brown's animation engine) in the browser via WebGPU

Hacker News49

Musical madness57%Launch Intel prediction score: how likely this product is to succeed on its source platform, based on its name, tagline, and description.

Musical madness

Hacker News8

Mantel-top computerized musical chimes with MicroPython on an ESP-3266%Launch Intel prediction score: how likely this product is to succeed on its source platform, based on its name, tagline, and description.

Mantel-top computerized musical chimes with MicroPython on an ESP-32

Hacker News44

FineEar~Chord61%Launch Intel prediction score: how likely this product is to succeed on its source platform, based on its name, tagline, and description.

How tuned is your musical ear?

Indie Hackerscommitment-full-time

Neverbleed – privilege separation engine for OpenSSL and LibreSSL54%Launch Intel prediction score: how likely this product is to succeed on its source platform, based on its name, tagline, and description.

Neverbleed – privilege separation engine for OpenSSL and LibreSSL

Hacker News47

Mediachain Attribution Engine54%Launch Intel prediction score: how likely this product is to succeed on its source platform, based on its name, tagline, and description.

Mediachain Attribution Engine

Hacker News64

Thredded Forums Engine70%Launch Intel prediction score: how likely this product is to succeed on its source platform, based on its name, tagline, and description.

Thredded Forums Engine

Hacker News5

Objective-C Tetris engine54%Launch Intel prediction score: how likely this product is to succeed on its source platform, based on its name, tagline, and description.

Objective-C Tetris engine

Hacker News3

Personalisation engine for Magento29%Launch Intel prediction score: how likely this product is to succeed on its source platform, based on its name, tagline, and description.

Personalisation engine for Magento

Hacker News1

Meteora – an interaction engine51%Launch Intel prediction score: how likely this product is to succeed on its source platform, based on its name, tagline, and description.

Meteora – an interaction engine

Hacker News1

Browse all products Analyze your launch