Add Sound Effects for External Speaker

Now Implemented!

Description

Allow pre-recorded sounds and effects to be played through the external speaker (when equipped) to override standard pedestrian alert sounds.

Status

Perhaps include sounds such as V8, turbo, jetson spaceship, plane, train, rocket, etc. Drivers should also be able to add/import their own sounds (e.g. mp3 on a USB).

All-electric vehicles are now required to add safety sounds in multiple countries:

https://ww.electrek.co/2019/10/07/tesla-customizable-horn-sounds-farts-goats/#

Status

Implemented with the BOOMBOX feature in 2020 for cars that have the external pedestrian warning speaker.