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Sobre este sonido
Original (http://www.freesound.org/people/cajo/sounds/34207/) procesado con sms-tools Transformation GUI as assigment of the Audio Signal Processing for Music Applications course at Coursera.org
The goal was to obtain a different bird sign, a more homogeneous one, playing with time scaling factors and freq stretching to compensating variations of pitch in the original sound. A freq scaling of 0.5 to go to a sub-octave range to accomplish a sound with more low frequency content.