Yeah, many of his sounds were very poor which I found ironic given his passion of improving the reproduction and the delivery a calling sound. I believe he may have also been the first to produce and sell a video of calling coyotes (VHS of very poor quality by todays standards) and close to the first if not the first in writing and selling a detailed "how to" calling book "All You Need To Know About Fox Calling". Russell Tinsley wrote a calling book "Critters Come When Called" prior to that when he followed the Burnham Brothers hunting one summer, but DK's book was the first I found back then to be fully detailed in all areas (callers, lights, camo, wind, noise, odors, set-ups, approach, etc). DK even personally wrote in the book I ordered that if I ever needed more help to give him a call and he wrote his phone number in the book. I still have both of these books and read them from time to time yet as they were the only sources of information back then (no books, no internet, etc). Without FFG and these books, it was all trial and error. Fur Fish Game advertisements seemed to be the only way to find new sources of information and products back in the 80's. The first cassette calling tape I purchased was from the first FFG magazine I received as a teenager. The cassette brand was True To Life sold by a OH family coon hunting supply company that recently just called it quits. It turns out the cassette was a copy of Johnny Stewarts sounds where JS sued and won in court. I have that FFG magazine (my first) along with that cassette tape on display in my calling collection as those items are what got me started in calling.