added simple A-Format to B-Format Converter

applications/SpatialAudio/ita_hoa_a2bFormat.m

+function [bformat] = ita_hoa_a2bFormat(FLU, FRD, BLD, BRU)
+%ITA_HOA_A2BFORMAT Converts an A-Format recording to  B-Format
+%   Detailed explanation goes here
+% Back Right Up (BRU);
+% Front Left Up (FLU);
+% Front Right Down (FRD);
+% Back Left Down (BLD);
+
+
+type=1; % type 2 is for DPA-4 Mics
+
+switch type
+    case 1
+        W = FLU + FRD + BLD + BRU;
+        X = FLU + FRD - BLD - BRU;
+        Y = FLU - FRD + BLD - BRU;
+        Z = FLU - FRD - BLD + BRU;
+    case 2
+        W = FLD+FRU+BLU+BRD;
+        X = FLD+FRU-BLU-BRD;
+        Y = FLD-FRU+BLU-BRD;
+        Z = -FLD+FRU+BLU-BRD;
+end
+
+bformat = ita_merge(W,X,Y,Z);
+end
+