Show HN: Convert recorded class lectures into PDF/eBooks

We turn lecture recordings into books you can study chapter by chapter. The explanations stay alongside diagrams and images from class, so you can work through the lecture at your own pace. One-time 15-minute trial. No card required. Watch the Lecture to Book walkthrough. See what a lecture becomes. Sleep and the Heart is a complete book made from a public-domain NIH lecture. Read the full sample and see how the explanations and figures work together. From the lecture to the page. Sleep and the Heart · Chapter 6 of 8Public-domain NIH lecture. Sleep disorders fall into three overlapping families: problems of sleep-wake regulation, sleep disruption, and circadian alignment. A human-cell diagram, extracted with its full set of labels intact. A survival-probability chart linking sleep-apnea severity to long-term mortality risk. Make a book from your recording. Choose a recording, check the estimate, and let us prepare your book. Choose a lecture recordingPick the lecture you want to study. Check the estimated duration and credits before you start. Let us prepare your bookWe organize the recording into chapters with diagrams and images from class. Follow its progress in your account. Make it part of your study routineRead online and keep notes beside the text. Download a PDF or ePub whenever you want your own copy. Come back to the part you need. Search the book for a term or an explanation. Keep a private note beside the text and bookmark passages for your next study session. Your library keeps each course's lectures together. When you're ready to review, choose Create study tools for saved flashcards and practice questions. Try answering before you reveal the answer, and check important details against your course materials. You can export your cards to Anki. For your courses. Use Lecture to Book for college lectures, professional programs, or online courses. You can sign up with your usual email address. Science and health Follow the explanation with the lecture diagrams beside it. Humanities and social sciences Work through an argument by section and leave a note where you want to return. Technical and quantitative courses Review the recorded explanation alongside your problem sets. Keep the original board work nearby to check the steps. Start with a recording you can hear clearly. Clear speech and readable slides give your book better source material. You can edit the draft before you export it. Best results when Clear audio with consistent speaker volume. Slides are readable on screen. The speaker explains one topic at a time. Still works when Slides are sparse but the narration is strong. There are occasional interruptions. You can edit the draft where needed. Check the parts that matter Check the draft against your lecture and course materials before you rely on it. Inaudible speech, unreadable slides, missing board work, or incomplete derivations may leave gaps. The book cannot recover material the recording does not contain. Try one short lecture excerpt Each new account gets a one-time trial of 15 minutes of recording time after email verification. No card required. Verify your email to use your free minutes. No card required. If your recording is longer than your remaining trial time, we’ll convert only the portion covered by your free minutes. Upgrade to process the rest. Trial PDF exports include a watermark that can be removed by upgrading and re-exporting. After upgrading, you can re-export the same project without processing the lecture from the beginning. You can read the full public sample before creating an account. Your library and notes are private. Uploaded recordings are removed after 30 days. Your books stay available until you delete your account. Read about storage and privacy. Try it on a lecture you want to understand. Start with a 15-minute excerpt and read the result before choosing a plan.