The web site contains hundreds of audio and video samples of speech all over North America. In each case, Rick has captured the accent of a native (more specifically, someone who was raised in a particular location, though not necessarily born there, and whose dialect clearly represents that place). Did your ancestors speak like this?
I grew homesick just listening to accents from Maine!
While this is a hobby for Rick Aschmann, it also has serious uses for historians, genealogists, and others. You can view Rick Aschmann's North American English Dialects site at http://aschmann.net/AmEng/.
My thanks to newsletter subscriber Steven Fleckenstein for telling me about this great web site.