Sorry for getting off track Bill... Here's my take on the different sounds of woods for box calls.. Honestly, from my experience, it's easier to build the sound someone is looking for by tuning it into the call rather than trying to pick a wood combo that makes that particular sound. What I mean is just because two guys build a butternut/walnut call for instance, it don't mean they will sound alike.. One may be deeper sounding while the other is higher pitched... One may be raspy, the other clear.. So I don't think there's any magic wood combo that just automatically produces a certain tone and pitch.. It's more about how the call is tuned to sound. Hope this helps.
Al