Audio export

Split a long recording without breaking its timestamps

After a 90-minute recording is split into 30-minute files, minute 5 in the second file was minute 35 in the source. Keeping the original time would send a listener to the wrong place. TAB.REC recalculates each exported part from zero.

Written by: PackWink operator · reproduced in the public release
Last checked: 2026-08-30
Reading time: 6 min read

ResultPlayable audio parts with a matching zero-based Markdown timeline

1. Pick a format for the next job

MP3 for everyday playback and sharing
WAV for another uncompressed editing stage
WebM to keep the browser-recorded source format
Markdown for searchable replay times and notes

2. Choose duration or estimated size

Duration makes sense for lectures and review blocks. Estimated size helps when an upload destination has a limit. Check the predicted number of files before starting so a small recording does not become dozens of fragments.

3. Each part starts at zero

TAB.REC subtracts the part start from every saved time and carries screenshot filename links into the matching export. The recording list and .tabrec source remain unchanged.

A saved time at source 00:35:00 with 30-minute partsSource: 00:35:00 question beginspart-02.mp3: 00:05:00 question beginspart-02.md: 00:05:00 question begins

4. Check saved times again after silence removal

Removing earlier silence shifts later saved times by the removed duration. A saved time inside a removed region stays excluded; keep that region if the note still matters.

Pre-export checklist

Play the first and last part
Check the first saved time in each Markdown file
Confirm the destination size limit
Keep an important source as .tabrec or WebM