My friend Nadine asked me another dev for the "Last bar before the end of the world" she owns : an announcement box, for both the bar crew and customers, to announce special events, happy hours or some go-go-go urgent stuff during rush hours.
The design tips were - ghostbusters - big red button to trigger the sounds - controls a spinning beacon as well while playing sound
A bit of airbrushing, a few gimmicks like the control/safety key and the audio bargraph. The red button blinks at 2 Hz while the music is playing. In the back side of the box, power in and power out to the speakers & beacon and a music selector with a rotary switch, 7 positions for 6 quotes + random.