23933__ricemutt__portamento_hpsModelTransformation.wav

This is a trnsformation of the original sound: http://freesound.org/people/ricemutt/sounds/23933/ , with the parameters:

For synthesis:
Window type: blackman
Window size: 801
FFT size: 1024
Minimum f0: 100
Maximum f0: 2500
Number of harmonics: 20 (we don't need too many harmonic here)
Threshold: -100
Stochastic decimation factor : 0.1
Minimum Sine Duration : 0.1

For transformation :
frequency scaling factors : [0,1,0.4,1,0.6,0.9,1.0,0.5,1.2,0.3,1.4,0.6] <- (make frequency variation steady)
frequency stretching factors : [0,2,0.5,1,0.51,0.7] <- (create a frequency variation, high->low )
timbrePreservation : 1 <- (no change)
time scaling factors : [0, 0, 0.8, 1.5,1.0,2] <- (make some "free fall" feeling)