This device is meant to make your car sound like something else. I can think of a reason to use it. You could get something like a Jackrabbit or a Dodge Scoot to sound like a Corvette or a Harley-Davidson. Good for making people freak out when you stick it in something that's electric powered! And I'll bet that a 2070 version will have Matrix connection to download different notes. Imagine a hacker making it sound like someone having sex inside!

Or worse, the hacker takes control of the suspension and while it sounds like people are having sex in the car it starts rocking...

Make the rigged up piece of metal sound like a dumb little electro-car.
drive up to an ilegal race with it, have the car look like shit and sound the part.
then up the ante, bet on yourself and beat someone with a car that sounds like a truck.
see their faces, take the money, switch off the chameleon-paint and the vroombox and drive away grinning like a loon

Classic!

i recall hearing about a system like this, years ago. but i never knew it had been turned into a actual product.

would be interesting if it came with a report system, so that one could match driving patterns to car sounds. i swear that if a car sounds like it has a lot of muscle, the driver will be more aggressive in traffic...

Go Gangs freaked out by the "invisible" helicopter that shows up when they try and run you off the road.
Or starting up your Scorpion up right under a targets window with the noise of a Tank so they think someones gonna take the wall down

My Jackrabbit is goingt to sound like Ghostwalker is coming this way.

There is some fanfic out there where a go gang group of orks had them installed to make their bikes sounds mean (They were electric and therefore the engines didn't make any sound). I can see that being part of the allure. An electric vehicle just just feels like it has no power if you can't hear it.