Simple binaural mixdown for ambisonics signals

applications/SpatialAudio/ita_3da_binauralMixdown.m

+function [ binOut ] = ita_3da_binauralMixdown( lsSignals, varargin )
+%ITA_3DA_BINAURALMIXDOWN Produces a 2-Channel binaural stream out of
+%loudspeaker signal(s) and coordinates (given as optional coordinates or
+%better: encoded in the itaAudio channel coordinates
+%   Detailed explanation goes here
+opts.HRTF='D:\DATA\sciebo\MKOScripts\HRTFs\2015_ITA-Kunstkopf_HRIR_2ch_D186_1x1_256_v17.daff';
+opts.LSPos=itaCoordinates;
+
+if nargin>1
+    opts=ita_parse_arguments(opts,varargin);
+end
+if ~(isa(lsSignals, 'itaAudio')&&(lsSignals.nChannels>0))
+    error('First input must be itaAudio with at least one channel')
+end
+
+if opts.LSPos.nPoints<1
+    opts.LSPos=lsSignals.channelCoordinates;
+    if opts.LSPos.nPoints<1
+        error('We need some channel coordinates!');
+    end
+end
+
+hrtfSet=itaHRTF('DAFF',opts.HRTF);
+
+binOut=itaAudio;
+
+for k=1:lsSignals.nChannels
+    hrtf=hrtfSet.findnearestHRTF(opts.LSPos.n(k));
+    convolved=ita_convolve(lsSignals.ch(k),hrtf);
+    if k==1
+        binOut=convolved;
+    else
+        binOut=binOut+convolved
+    end
+end
+