This a amaj drone tone created from an orchestra tuning sound segment (http://www. Freesound. Org/people/acclivity/sounds/24205/). Through an harmonic model, the low brass section have been separated of the trumpets and then a series of harmonic (harmonizer) transformations have been done in order to include a major third and a perfect fifth in the f0 = a2 harmonic serie. The a tuning is a little bit down from 110hz (~106-107hz).
The sound of me attaching and deattaching two of my lenses to my pentax k-x which are the 18-55mm kit lens first and then my 80-200mm sears lens next. It was i believe five times for each lens. Recorded with the audio technica atr 6550.
