Record a webinar on a Mac.

Your own copy of a session you attend

Webinars run in a browser or in Zoom, Teams, Webex, and similar apps. echo99 doesn’t mind which, because it records what your Mac plays, the way you hear it:

• The webinar audio, saved as system.wav. On-device speaker separation (diarization) labels the presenters “Them-1”, “Them-2”, …
• Your microphone: mic.wav, labeled “Me”, for the moments you ask a question or speak up.

After you stop, the transcript lets you search for the answer you came for instead of rewatching the hour. echo99 captures sound only, so pair it with your own notes for the slides and screen share.

How to record a webinar

1. Set up echo99 once with getting started: grant microphone and system audio recording access and download the on-device models.
2. Join the webinar on your Mac with the audio playing through it, and keep the Mac awake until the end.
3. Click Record in the echo99 menu-bar panel yourself. Auto-record calls only starts when another app uses your microphone, and while you just listen the mic is often unused.
4. Click Stop Recording when the session ends, then open Recordings to search the transcript and play the audio.

Each recording gets a folder named by its start time in ~/Documents/echo99/ (change it in Config → Storage). Since you mostly listen, the system track carries the session. echo99 still records your microphone the whole time, whatever your mute setting in the webinar app, so nearby speech and room sounds end up in mic.wav. If the room stays quiet, the menu-bar panel may show “Mic looks silent” after about 90 seconds; when you are only listening, that is expected.

Long sessions

• Disk space. Both tracks are 24 kHz mono 16-bit WAV, about 350 MB per hour together.
• Transcription time. Apple silicon Macs transcribe fastest; Intel Macs are supported but noticeably slower on a long recording. Turning on Config → Transcription → Skip silence during transcription skips long silent stretches in recordings of two minutes or more. It needs the Silence detection model.
• Follow along live. The optional live transcript preview (Config → Experiments, off by default) shows the words in a floating window as they are spoken. The saved transcript is still made after you stop.
• Got the replay instead? If the organizer shares a recording you can download, such as an MP4, import it for a local transcript.

Tell people you are recording

echo99 never joins the webinar, so nothing like the platform's recording notice tells the others you are recording. Many jurisdictions require the other side’s consent, and your organization or the host may have rules of its own. Say it out loud at the start, before the conversation gets going.

Webinars often come with terms that restrict recording or redistribution, and the official recording, if there is one, is the organizer’s to share. Keeping a copy for your own reference is different from publishing it. Either way, stay within the organizer’s terms and your local law.

Related guides: Record a podcast, Record Teams calls, Speaker identification, Meeting summaries, Transcribe audio and video files