function X=ipowspec(A,varargin)
% IPOWSPEC - convert power/phase spectrum to wave
%
% ipowspec :: [[M+1,L]]~'power spec', [[M+1,L]]~'phase' -> [[2*M,L]]~'signal'.
% ipowspec :: [[M+1,L]]~'power spec' -> [[2*M,L]]~'signal'.
%
% Second form uses random phases.
X=imagspec(sqrt(A),varargin{:});

