SFS Toolbox 2.4.2

New version of the Sound Field Synthesis Toolbox, for documentation see http://matlab.sfstoolbox.org/en/2.4.2.
This release fixes small bugs, removes obsolete local WFS functions and introduces optional logarithmic spacing of linear secondary sources.

NEWS:

    - extend signal_from_spectrum and spectrum_from_signal to N-dim matrices
    - remove obsolete *_localwfs functions
    - add optional logarithmic spacing for linear secondary sources