Question

Read the following transcript of an interview between radio journalist Manuel Ortega and archival preservationist Dr. Sofía Valenzuela regarding the Andean Audio Heritage Restoration Project:

Manuel Ortega: "Dr. Valenzuela, your team recently concluded the four-stage initiative to recover fragile 19th-century field recordings across the Andes. Could you outline the specific technical outcomes and developments of each phase?"

Dr. Sofía Valenzuela: "Certainly, Manuel. In Phase I, our priority was eliminating mechanical risk; by implementing contactless laser optical scanning, we successfully transcribed 312 severely fractured wax cylinders that would have shattered under conventional stylus pressure. Moving to Phase II's ultrasonic cavitation surface cleaning, we experienced an unexpected obstacle: ambient humidity fluctuations caused micro-fractures in the non-vulcanized beeswax cores, forcing a 6-month operational delay to stabilize environmental controls. Once the media were cleaned, Phase III focused on neural spectral noise subtraction, which yielded our primary acoustic breakthrough by recovering 42% of sub-500 Hz vocal harmonics that had been masked by fungal erosion. Finally, in Phase IV, to bypass unreliable rural internet infrastructure, we physically delivered uncompressed 96 kHz archival masters directly to seven indigenous community centers via solar-powered storage systems."

Manuel Ortega: "A remarkable synthesis of technical precision and cultural repatriation."

Based on the interview transcript, match each project phase to its exact factual outcome or technical detail.