It's jzucker from the forum. I'm the author of Sheets of Sound for Guitar and write a column for Guitar Jam Daily. I've also got a ton of product demos up at http://www.youtube.com/sheetsofsound
I'd be happy to work with you on this bug. I'm using the latest beta software and I'm still getting the sustained distorted note at 14 bits. Let me know how I can help .