Per the PINMAME homepage news:
"You'll need this update to play The Sopranos successfully!
Check out the new speech clarity for all WMS games up to The Twilight Zone, too.
Maybe you'll also find a new hidden feature... I won't give it away! :)
Don't hesitate, get your copy today!"

Get them here:
http://pinmame.retrogames.com/downloads.html

-Trebor