Yes, I just listened to it and the music was Echoes from the Pink Floyd album Meddle with a snippet of the previous song, Seamus. Naw, I wouldn't change a thing! Well I might mix it a little lower in volume if I were to do it again, which I am not.
But yes, Pink Floyd were the masters of noise from the otherworldly noises in Echoes to the airport noises on Dark Side of the Moon to elevator noises in Wish You Were Here to all the telephone nonsense on The Wall. Always Pink Floyd put their music in the context of life. They loved noise and let it inspire their music.