Recording of Manuel Rocha Iturbide's Atl. This is a work for digital tape, and the sound of the piece were made digital audio software Turbosynth and Sound designer. It was mixed down in a 24-track studio at the Center of Contemporary Music of Mills College. The composer states, "By means of transforming and working with the same sound object, I arrived to the conclusion that I could open and reveal it through time. The methodology of working with only one sound would define then the structure of the whole piece, and would give coherence to the composition in terms of timbre. My first experience in this direction was with my tape piece ATL, where I made all the sounds except one, starting from the manipulation of a 7 seconds sample of a small water stream. Other composers have made pieces with water sounds which are very compelling, but non that I know have made a spectra-morphological research about a portion of a water stream sound. In this way, all the micro-characteristics of the original sound object as it's chaotic rhythm and its hidden spectral qualities are enlarged. In a way, this works exactly as fractal theory in Chaos, where micro structures are equivalent to macro structures. For me, this is a way to contemplate something that in normal conditions would escape us. In this way, the ear becomes like a microscope and we have the impression of traveling within the sound and of being covered by it. Then, there is also all the metaphoric meaning attached to every sound transformed, and of the relationship between sounds, because we can't consider a sound object in a composition as an isolated element. This sound will always say something different depending in the context it is found. To make this clear, there is an example at the end of my composition where there are water flows that seem to be swollen from the earth, following them, a new sound emerges which seems to be also water but which in fact is one voice speaking superimposed over and over. This voice becomes like water because of the context it was placed in. On the other hand, a metaphoric meaning rises from the whole structure of the piece. ATL begins with water transformed sounds that have an instrumental quality that reminds us of some eastern instruments as the drone of the Tampura in Indian music and the Buddhist bells from Tibet. These sounds makes us think of the ritual or religious events related to the playing of those instruments, and so, the water sounds become as part of a ritual that puts us in a state of contemplation. At the end of the piece, the descending water flows that get stronger and stronger makes us thing of falling into something or being swollen by something. As we relate water to the psyche, this could mean that we are abandoning the conscious realm in order to enter the subconscious, being thus liberated from the rational world by entering into a sort of catharsis".