This is one of those projects where it may be hard for somebody who doesn't understand audio engineering to really appreciate the amount of work done and the enormity of the accomplishment. White Water's original sound quality may not be the best but the intricacy of the soundtrack is daunting.
The clips I've heard sound great as far as the quality of the samples (especially compared to the original quality). I mean, who even has access to a studio facility like that for pinball sounds? What you're NOT going to get is an exact 1-to-1 replica of the music and call-outs. I think that if anybody is expecting this project to sound exactly like the original but with hi-fi sound quality, then they are setting themselves up for disappointment. Even with Warren Davis doing the call-outs, there's simply no way that he would say the lines the same way, with the same inflections, after 30 years. I hope that most people understand just how special it is that Endprodukt got Warren Davis at all.
The music is what I'm most excited about though. Maybe the clips are gone but the work in progress posted was pretty amazing. You got Endproduckt playing stuff live that wasn't even recorded live in the first place! And the quality of the sounds far surpasses the type of sounds they used with the original. Objectively speaking, it sounds leagues better.
On a side note, my suspicion is that "Howdy Wet" is a sample on the chip but it's just not utilized in the game program.