What's the piano 'ding' in eM Client sound notifications pitch and notes?

I’ve used eM Client for nearly a decade now, and bought my lifetime license way before I convinced my Company to adopt the software as the daily driver for all employees. Big W right there.
My question is completely void of priority: who’s the author of the piano ‘ding’ that notifies the arrival of new items? Can you ask them what music notes does the piano do? Just that.