octave-ltfat 2.1.1+dfsg-1 (arm64 binary) in ubuntu xenial

 This package provides a Matlab/Octave toolbox for working with
 time-frequency analysis, wavelets and signal processing. It is
 intended both as an educational and a computational tool. The toolbox
 provides a large number of linear transforms including Gabor and
 wavelet transforms along with routines for constructing windows
 (filter prototypes) and routines for manipulating coefficients.
 .
 This Octave add-on package is part of the Octave-Forge project.