add stand alone function to get the sound devise id

Author: marcobarilari

src/utils/ptb_soundDevice_test.m

@@ -0,0 +1,48 @@
+sca
+clear
+clc
+% PsychPortAudio('Close');
+
+cfg.audio.playbackMode = 1;
+cfg.audio.channels = 2;
+cfg.audio.requestedLatency = 3;
+
+InitializePsychSound(1);
+audioDev = PsychPortAudio('GetDevices');
+
+% tmp = [2 3 9];
+
+for idx = 10   
+    
+    fprintf(1, '\n%i: %s\n', idx, audioDev(idx).DeviceName);
+    
+    cfg.audio.devIdx = audioDev(idx).DeviceIndex;
+    
+    % get device's sampling rate
+    cfg.audio.fs = audioDev(idx).DefaultSampleRate;
+    
+    try
+        cfg.audio.pahandle = PsychPortAudio('Open', ...
+            cfg.audio.devIdx, ...
+            cfg.audio.playbackMode, ...
+            cfg.audio.requestedLatency, ...
+            cfg.audio.fs, ...
+            cfg.audio.channels);
+        
+        clear sound
+        sound = rand(cfg.audio.channels, cfg.audio.fs);
+        
+        PsychPortAudio('FillBuffer', cfg.audio.pahandle, sound);
+        PsychPortAudio('Start', cfg.audio.pahandle);
+        
+        WaitSecs(1.5);
+        
+        PsychPortAudio('Close');
+        
+        WaitSecs(1);
+    catch
+    end
+    
+     pressSpaceForMe 
+    
+end