Coin Drop Sounds:
Provides a coin drop sound effect when a coin is inserted in MAME. Gives a little extra info if -verbose is on.
Currently selects one of three random sounds. Eventually, it will have some variations to use based on coin count, to sound like a fuller coin box.
Tested in Windows & Batocera Linux.
Assistance provided by cuavas on Reddit with optimizing the original version
Sound player code modified from DKChorus plugin by Jon Wilson (10yard)
External sounds on Windows systems using "sounder" by Eli Fulkerston: https://download.elifulkerson.com/files/sounder/