You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: process_aec2.m
    path of file: ./repos/brainstorm3/toolbox/process/deprecated
    
    the code of the file until where you have to start completion: function varargout = process_aec2( varargin )
% PROCESS_AEC2: Compute amplitude envelope correlation between one signal in one file, and all the signals in another file.

% @=============================================================================
% This function is part of the Brainstorm software:
% https://neuroimage.usc.edu/brainstorm
% 
% Copyright (c) University of Southern California & McGill University
% This software is distributed under the terms of the GNU General Public License
% as published by the Free 
    
function sProcess = GetDescription() %#ok<DEFNU>
    % Description the process
    sProcess.Comment     = 'Amplitude Envelope Correlation AxB';
    sProcess.Category    = 'Custom';
    sProcess.SubGroup    = 'Connectivity';
    sProcess.Index       = 657;
    sProcess.Description = 'https://neuroimage.usc.edu/brainstorm/Tutorials/Connectivity';
    % Definition of the input accepted by this process
    sProcess.InputTypes  = {'data', 'results', 'matrix'};
    sProcess.OutputTypes = {'timefreq', 'timefreq', 'timefreq'};
    sProcess.nInputs     = 2;
    sProcess.nMinFiles   = 1;
    sProcess.isPaired    = 1;
    
    % === CONNECT INPUT
    sProcess = process_corr2('DefineConnectOptions', sProcess);
    % === FREQ BANDS
    sProcess.options.freqbands.Comment = 'Frequency bands for the Hilbert transform:';
    sProcess.options.freqbands.Type    = 'groupbands';
    sProcess.options.freqbands.Value   = bst_get('DefaultFreqBands');
    % === Orthogonalize pairs of signals
    sProcess.options.isorth.Comment = 'Orthogonalize signal pairs before envelope computation';
    sProcess.options.isorth.Type    = 'checkbox';
    sProcess.options.isorth.Value   = 0;
    % === OUTPUT MODE
    sProcess.options.outputmode.Comment = {'Save individual results (one file per input file)', 'Concatenate input files before processing (one file)', 'Save average connectivity matrix (one file)'};
    sProcess.options.outputmode.Type    = 'radio';
    sProcess.options.outputmode.Value   = 1;
    sProcess.options.outputmode.Group   = 'output';
end