(draft from 25 Nov '21)
If an instrument can be a release then I guess so are…
- Open door chimes
- Children toys such as music boxes or karaoke machines
- Pasta timers
- Alarm clocks, electronical or mechanical: Jungshans (video), Colibri
- Phones (they usually come with ringtones and possibly other music)
- Software such as keygens or operating systems
- Cars
- …