Chalk

How it works

Five steps from a recording to a library you can study from.

Bring in one recording and Chalk handles the rest. Want proof? Watch it run on a real clip in the demo.

01

Bring your recording in

Record live in your browser and Chalk captures it as you go, uploading in the background so nothing waits until the end. Already have the recording? Upload a file, paste a link, or pull it in from Zoom or Webex.

Someone recording a talk from a laptop
REC 01:14:22
Segment 7 uploading · 6 done
02

Transcribe every word

The moment you stop, Chalk transcribes the audio with precise, word-level timestamps. Long recordings are split and transcribed in parallel, so even a three-hour session is ready in minutes, not hours.

Transcriptword-level timing
11:38So the derivative measures an instantaneous rate of
11:44change. Picture the slope of a line that's tangent
11:51to the curve at exactly one point, that's it.
12:03Let's build it from the limit definition…
03

Break it into a table of contents

An AI reads the full transcript and splits the recording into titled topics with short summaries. You get a clickable table of contents that covers the whole thing, start to finish, with no gaps.

AI table of contentsno gaps
  • 01Recap: limits and continuity04:12
  • 02The derivative, defined from scratch11:38
  • 03Rules of differentiation23:05
  • 04Worked example: optimization35:50
04

Turn it into a study pack

Every recording comes with a study pack built from its own transcript. Flashcards on a spaced-repetition schedule. A glossary that jumps to where each term was defined. Quizzes aimed at what people usually miss.

Study pack · The derivative

Flashcard

What does the derivative measure?

The slope of the tangent line at a point.

ForgotHardGot itEasy

Key terms

  • 04:12Continuity
  • 11:38Derivative
  • 23:05Chain rule

Written from this recording’s transcript, not generic filler.

05

Clip it and share

Found the part that finally made it click? Export any topic as a clip in one tap. Save it for later, or send someone the exact four minutes they missed.

Sharing a clip from a recording
clip · “Worked example: optimization” · 12:45Export

See it run

Drop in a recording. Get a clickable, searchable library in minutes.

Audio, transcript, AI chapters, and a clickable player, all built for you in a couple of minutes. No account, no setup.