Lecture Audio

Upload lecture recordings or link YouTube lectures to study from audio with full transcription and AI features. This is a Study Pack feature.

Uploading a recording

1. Tap the + button.
2. Select Upload Audio.
3. Choose a file from your device.

Supported formats: MP3, M4A, WAV (up to 200 MB).

What happens after upload

• Transcription — the audio is automatically transcribed using speech-to-text. This usually takes a few minutes depending on the recording length.
• Chapter markers — AI generates chapter markers based on topic changes in the lecture, so you can jump between sections easily.
• Original audio preserved — unlike articles, lecture recordings play back with the original audio (the actual lecturer’s voice), not a TTS voice.

YouTube lectures

Instead of downloading and uploading, you can paste a YouTube URL directly:

1. Tap the + button.
2. Paste the YouTube lecture link.
3. KeepStream extracts the transcript automatically (no audio download needed).

YouTube lectures show a “Watch on YouTube” button if you want to see the video. The transcript is what powers the study features.

What the transcript enables

Once a lecture is transcribed, you can:

• Search within the transcript for specific topics or terms.
• Generate quizzes from the lecture content.
• Include it in cram sessions alongside your readings.
• Ask Insights questions about what was covered in the lecture.

Adding to courses

Lecture recordings can be added to courses just like any other item. They’ll be included in course-specific cram sessions and quizzes alongside your readings and PDFs.

Tips

• Record lectures on your phone and upload them directly — no need to transfer to a computer first.
• For long lectures (60+ minutes), chapter markers are especially useful for jumping to the section you need.
• If a recording has poor audio quality, the transcript may have gaps. The AI does its best, but clear audio produces better results.