This one was to scratch my own itch and to provide a solution I didn't see elsewhere. It looks complicated, but it really isn't.
See, Thunderbird's notifications (especially the calendar event reminder notification sound) can be quiet compared to other system sounds. It may then go unnoticed.
Well, there's an easy fix. Download Audacity (or an alternative), find the sound file, open the sound file, and make it louder. This is easiest if you select your own notification sounds.
https://linux-tips.us/increase-the-volume-of-thunderbird-notifications/
It's not all that well written, but it's close enough for government work. I don't figure this will be all that popular, but at least this method is now out there and search should find it after it's indexed.
See, Thunderbird's notifications (especially the calendar event reminder notification sound) can be quiet compared to other system sounds. It may then go unnoticed.
Well, there's an easy fix. Download Audacity (or an alternative), find the sound file, open the sound file, and make it louder. This is easiest if you select your own notification sounds.
https://linux-tips.us/increase-the-volume-of-thunderbird-notifications/
It's not all that well written, but it's close enough for government work. I don't figure this will be all that popular, but at least this method is now out there and search should find it after it's indexed.