 Fernando Pablo Lopez-Lezcano
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67dbcabf37
leave the proper sin transition length of 8
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před 10 roky |
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Fernando Pablo Lopez-Lezcano
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9e4db32f26
add code to implement the minimum phase transformation described in "Two alternative minimum-phase filters tested perceptually", AES paper 9554, yields much smaller phase shifts in the high frequency range
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před 10 roky |
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Fernando Pablo Lopez-Lezcano
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cd4d83ad71
use a spline for the 1/8 octave plot, plot only until 20KHz
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před 10 roky |
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Fernando Pablo Lopez-Lezcano
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f1cc1ca19d
printing changes tuning for publication quality
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před 10 roky |
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Fernando Pablo Lopez-Lezcano
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502d0e8875
add plot options for color, mono, eps or png plots
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před 10 roky |
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Fernando Pablo Lopez-Lezcano
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ad11da3ecd
add special case for testing
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před 10 roky |
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Fernando Pablo Lopez-Lezcano
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11735bbf4c
normalize filters to average of W around the transition frequency, create eps figures by default
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před 10 roky |
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Fernando Pablo Lopez-Lezcano
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e1c963ccd3
make Z optional in sphear_fir_design, if not supplied X and Y are averaged - useful when we do not have valid data in Z
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před 10 roky |
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Fernando Pablo Lopez-Lezcano
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eadcff6535
calculate filters for X Y and Z separately, no need to average all components at once
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před 10 roky |
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Fernando Pablo Lopez-Lezcano
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6230776a0b
use interp1 instead of spline so we can try different interpolation methods, cubic seems to work a little better for our purposes
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před 10 roky |
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Fernando Pablo Lopez-Lezcano
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247fa323d8
add one more point that is later not used to fit the spline so that the transition between the two frequency regions is smoother
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před 10 roky |
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Fernando Pablo Lopez-Lezcano
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ad9a2c02fd
fit the spline only for the high frequencies, for low frequencies keep the A2B coefficients untouched, make graphs of filters better
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před 10 roky |
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Fernando Pablo Lopez-Lezcano
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afa32fdf1d
add maximum amount of boost to limit filter ends after fitting the spline, this still does not work out in low frequencies, perhaps we need to fit the spline only in the upper frequency range and just leave the A2B matrix alone in the low frequency range
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před 10 roky |
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Fernando Pablo Lopez-Lezcano
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fdaeb3574a
change the way the filter is designed, get a spline to interpolate a smooth frequency response curve, plot some graphics to see what is going on
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před 10 roky |
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Fernando Pablo Lopez-Lezcano
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2e6c00810d
sphear_fir_design: change completely to use supplied W and XYZ filter shapes for the high frequency region
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před 10 roky |
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Fernando Pablo Lopez-Lezcano
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11f36731c6
add sphear_fir_design.m, design a matrix of FIR filters that makes up the A2B matrix
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před 10 roky |
