i recorded these like 18 months ago. the point wasn't to record the sound but to examine how i type, i do touch type but i appear to only use two fingers on my right hand, it got me upset. I am also a jack-hammer when i type, which why all my rubber dome keyboards died so quickly.
(these are flickr video so you have to click on the picture/link to see them)
Model M (note is sitting on my metal base for my monitors, i think it made it even louder than it is)
Full-Metal ErgoDox with stock clears