Approx. 3:30am (0330 CST) Lubbock, Texas. This is the second time in as many days that I have been awoken by this sound. I only had my camera to record this sound, so the quality probably sucks. I live in the Texas High Plains. I have lived here all my life, and I do not think this is a cotton gin considering I live in the middle of the city. I will be posting this to other sites as well. Thank you.