The Audio Stuff Tools

What it does

12 client-side audio tools for audiophiles and sound engineers, all running in the browser. No account, no upload, no tracking. Includes: headphone amp power calculator, speaker amp power calculator, room mode visualizer, ABX double-blind test, Golden Ear frequency training, audio signal generator, hi-res audio fraud detector (FFT), SPL safe-listening timer, cable gauge calculator, treble roll-off calculator, and more. The math pro audio software charges for, free.

Free, in your browser Free audiophile & sound engineering tools Sixteen calculators and analyzers for the questions that come up between deciding you want better sound and actually getting it: whether an amp will drive a given headphone, what a room is doing to the bass, whether a file is really hi-res, whether you can hear a difference at all. Everything runs in your browser. No download, no account, no upload, no tracking - audio files you load never leave your device. Your ears & listening Train your hearing, run blind tests, find your sound, and listen safely. (5 tools) Test Can I actually hear the difference? ABX Blind Test Six built-in synthetic test pairs, no upload needed - or drag…from theaudiostuff.com

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  Headphone Power Calculator2017 · headphonesty.com · ▲5

  Check this before spending $$$ on that expensive amplifier

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  My Audio ToolsSep 2026 · ▲1

  Edit, convert, test, and analyze audio online for free

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  Sound Tools2025 · soundtools.dev · ▲9

  Free online audio editor

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  Diamond Audio CityNov 2025 · diamondaudiocity.com · ▲6

  Smart audio tools & calculators

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  TonaluxMay 2026 · tonalux.org · ▲2

  Free audio tools that run entirely in your browser

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  Music BuddyDec 2025 · musicbuddy.net · ▲5

  Now supports Tranposing Instruments + Scales and Arpeggios

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  Lofi Cities – Pixel-art city nights with browser-generated lofi▲319

  Endless lofi beats composed live in your browser, over pixel-art nights in Paris, Tokyo, New York, Hong Kong, Sydney, San Francisco and more. Free, no sign-up.

  Work · 25d ago · loficities.com

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  Smooth Recorder▲257

  Mac screen recordings that look edited when you hit stop

  Work · 19d ago · smoothrecorder.com

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  Figma Specs▲223

  A container for your context that lives on the Figma canvas

  Work · 4d ago · figma.com

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  The rarest tech books and docs you've probably never read▲190

  Work · 13d ago · readrare.com

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  Brew ▲900

  Like Claude design for email marketing

  AI · May 2026 · brew.new

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  Kilo Code for VS Code▲896

  Parallel agents, diff reviewer, and multi-model comparisons

  Dev tools · May 2026 · kilo.ai

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  StoreClaw▲806

  Grow your store profits with agents that know how to sell

  AI · May 2026 · storeclaw.ai

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  PollyReach▲795

  Give your agent a real number and voice to make calls.

  AI · May 2026 · pollyreach.ai

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  Needle: We Distilled Gemini Tool Calling into a 26M Model▲776

  Hey HN, Henry here from Cactus. We open-sourced Needle, a 26M parameter function-calling (tool use) model. It runs at 6000 tok/s prefill and 1200 tok/s decode on consumer devices. We were always frustrated by the little effort made towards building agentic models that run on budget phones, so we conducted investigations that led to an observation: agentic experiences are built upon tool calling, and massive models are overkill for it. Tool calling is fundamentally retrieval-and-assembly (match query to tool name, extract argument values, emit JSON), not reasoning. Cross-attention…

  Life & fun · May 2026 · github.com

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  Files.md – Open-source alternative to Obsidian▲730

  🌱 Private, quiet space for thinking. Simple app for .md files. - zakirullin/files.md

  Dev tools · May 2026 · github.com