Erik, I think you would do many a service. I understand Bryce's position and can only say his contributions to the forum are already obvious and unquestionable. Having said that, some of the sounds I have already heard posted here have been very helpful. I have hundreds of hours of experience on the XLT, and Tone ID on that machine has been around a long, long time. So has VCO and VCO pinpoint... but I needed some help focusing on the valued signals. I didn't expect to get trained to expert level, and I take folks to the park and use a splitter on my XLT so others can hear the sounds I hear and then listen to my commentary... which I offer "as is". It generally helps new folks a lot. (Sounds a lot like what Bryce does for those in his area). I guess Bryce has the difficulty of being somewhat of a celebrity, so he is understandably more cautious in what he is willing to offer. If I confuse somebody, they can just chalk it off to that XLT guy who didn't have a clue.... but in Bryce's case it is not so easy.
Anyway, I think there will be plenty of folks who can benefit, and have enough experience with other machines to understand that variability of mixed targets is common.
One of the most helpful descriptions (in addition to the sounds themselves) has been the description of target sounds as being "flutey".
I have a bit of a music background... enough to know that most people do not possess perfect pitch; that is, most people can't hum a middle 'c' perfectly or even hear one and know for sure it is 'dead on'. Most are pretty decent with relative pitch, and hearing the good sounds in conjunction with the probable trash sounds is beneficial for many...
I find I have to guard against 'penny creep' in that after finding a couple of good silver targets, I am more likely to dig copper pennies or even mineralized clad pennies. The XLT separates the sounds 'wider', and if I haven't heard a true 'flutey' sound in a while, I find myself jumping at the relatively high sounds of the pennies. I should differentiate with the number screen, since the numbers are pretty consistent.
Anything you can do to present relative sounds (even if the targets are identified after they are dug) would be appreciated.
but I have some equipment that will record these sounds in better than CD quality and the ability to shoot video in Hi-Def with live commentary. I realize that not everyone thinks this is worthwhile endeavor, but for those that do, please provide some input here or by PM (if you feel more comfortable). As you know I'm in northern NJ, and I would also like to record video with a cameraman -- please let me know if anyone is interested in collaborating locally or even over the Internet on this. 
Jim