pytimbre.utilities.yin.parabolic_interpolation

pytimbre.utilities.yin.parabolic_interpolation(y1, y2, y3)

Parabolic interpolation of an extremal value given three samples with equal spacing on the x-axis. The middle value y2 is assumed to be the extremal sample of the three.

Parameters:

• y1 (f(x1))

• y2 (f(x2))

• y3 (f(x3))

Returns:

• x_interp (Interpolated x-value (relative to x3-x2))

• y_interp (Interpolated y-value, f(x_interp))