# CaChink

> Browser guitar suite: playable tabs, swipeable lessons, a chord finder, a
> virtual pedalboard (Tone Studio), an audio→tab transcriber, and a mic tuner
> that pays you a coin sound when you hit pitch. Mobile-first, everything runs
> on-device in the browser — no app install, no account required.

Every tab is playable: chord diagrams strum on tap and the ASCII tab renders
to synthesized audio in the song's own tuning and capo. Anyone can request a
song at https://cachink.producthacker.ai/requests and a live agent builds the tab while they watch.

## Pages

- Tab Library: https://cachink.producthacker.ai/tabs
- Learn (card-deck lessons): https://cachink.producthacker.ai/learn
- Chord Finder & Library: https://cachink.producthacker.ai/chords
- Tone Studio (virtual pedalboard): https://cachink.producthacker.ai/tones
- Transcribe (audio → editable tab): https://cachink.producthacker.ai/transcribe
- Tuner: https://cachink.producthacker.ai/tuner
- Request a tab: https://cachink.producthacker.ai/requests

## For agents

- JSON API (read-only, no auth): https://cachink.producthacker.ai/api/tabs and https://cachink.producthacker.ai/api/lessons
- OpenAPI 3.1 spec: https://cachink.producthacker.ai/openapi.json
- MCP server (streamable HTTP, no auth): POST https://cachink.producthacker.ai/mcp — manifest at https://cachink.producthacker.ai/.well-known/mcp.json
- Tools: list_tabs, get_tab, search_tabs, list_lessons, get_lesson
- Full tab objects include tuning, capo, key, chord fingerings, sections with
  ASCII tab blocks, gear/tone notes, and per-section tempo data.

## Tabs (19)

- Starships — Nicki Minaj (Easy, Standard (EADGBE)): https://cachink.producthacker.ai/tab/starships
- The Real Me — Zebrahead (Medium, Standard (EADGBE)): https://cachink.producthacker.ai/tab/the-real-me
- House of the Rising Sun — Traditional (Medium, Standard (EADGBE)): https://cachink.producthacker.ai/tab/house-of-the-rising-sun
- Ode to Joy — Beethoven (Beginner, Standard (EADGBE)): https://cachink.producthacker.ai/tab/ode-to-joy
- Happy Birthday — Traditional (Beginner, Standard (EADGBE)): https://cachink.producthacker.ai/tab/happy-birthday
- In the Meantime — Spacehog (Easy, Standard (EADGBE)): https://cachink.producthacker.ai/tab/in-the-meantime
- Santa Monica — Everclear (Easy, Standard (EADGBE)): https://cachink.producthacker.ai/tab/santa-monica
- Wait and Bleed — Slipknot (Medium, Standard (EADGBE)): https://cachink.producthacker.ai/tab/wait-and-bleed
- Pacific Coast Highway — The Hip Abduction feat. Trevor Hall (Easy, Standard (EADGBE)): https://cachink.producthacker.ai/tab/pacific-coast-highway
- Trade-Off Jam — Rhythm & lead sets for two guitars (Easy, Standard (EADGBE)): https://cachink.producthacker.ai/tab/trade-off-jam
- I Never Lie — Zach Top (Easy, Standard (EADGBE), Capo 1): https://cachink.producthacker.ai/tab/i-never-lie
- Wish You Well — Vincent Mason (Easy, Standard (EADGBE), Capo 1): https://cachink.producthacker.ai/tab/wish-you-well
- Gives You Hell — The All-American Rejects (Easy, Standard (EADGBE), Capo 4): https://cachink.producthacker.ai/tab/gives-you-hell
- Killing in the Name — Rage Against the Machine (Easy, Drop D (DADGBe)): https://cachink.producthacker.ai/tab/killing-in-the-name
- Bombtrack — Rage Against the Machine (Medium, Drop D (DADGBe)): https://cachink.producthacker.ai/tab/bombtrack
- November Rain — Guns N' Roses (Hard, Eb standard): https://cachink.producthacker.ai/tab/november-rain
- Say It Ain't So — Weezer (Medium, Eb standard (EbAbDbGbBbEb)): https://cachink.producthacker.ai/tab/say-it-aint-so
- Wish You Were Here — Pink Floyd (Medium, Standard (EADGBE)): https://cachink.producthacker.ai/tab/wish-you-were-here
- Feel This Way — Zebrahead (Medium, Standard (EADGBE)): https://cachink.producthacker.ai/tab/feel-this-way

## Lessons (4)

- Rhythm — Feel, Time & the Comp (Fundamentals): https://cachink.producthacker.ai/learn/rhythm-feel — The right hand is the instrument. Eight grooves you can play against — straight, swung, four-to-the-bar, Charleston, sixteenths, the One — with the mechanism behind each one.
- Jazz I — The ii–V–I Toolkit (Intermediate): https://cachink.producthacker.ai/learn/jazz-ii-v-i — Six progressions that between them cover most of the Real Book — plus what to play over each one.
- Jazz II — Rhythm Changes, Coltrane & Modal (Intermediate +): https://cachink.producthacker.ai/learn/jazz-beyond-ii-v-i — What to play when the ii–V–I stops being enough: fast turnarounds, three tonal centres, and one chord for sixteen bars.
- Funk — Vamps, Stabs & the One (Intermediate): https://cachink.producthacker.ai/learn/funk-vamps — Funk harmony barely moves — so everything happens in the right hand. Five grooves, why each one sits, and how to solo when nothing changes.