Recorded with samson meteor connected to the phone in the moscow metro at 6 a. M. In the train that passed two stations of the lyublinsko-dmitrovskaya line. There were no people in the train car. The sound was refined with adobe audition.
In a metro station scalator produce a horror screech. We can listen people walking, street and hall ambience. Recorded 48/24 with omnidirectional stereo microphones.