Throughout this recording there are some pops and sort of crackling sounds that resemble rocks being rubbed together, which could indicate some movement during the recording. At 4:11 there is a car that starts and drives off. There are also some very distant birds talking from about the 12 minute mark right up until the last minute of the recording. It seems to be only one or two birds calling back and forth to one another. Yet, the calls are very quiet in the recording and certainly require headphones to hear. The author describes the setting at Jornada Experimental Range on March 14th at 6:14AM, about an hour before sunrise. He recorded Ambisonic SPS2000 on channels 1 - 4 and MS on channels 5 & 6.