Added string compatability dtTonalAnnotate

src/matlab/user_interface/dtTonalAnnotate.m

@@ -53,7 +53,13 @@
 %           'Energy' - SNR threshold is measured in dB (default 10). 
 %           'DeepWhistle' - Confidence threshold [0, 1] (default .5).
 
-
+% Convert any and all string arguments to character arguments to allow
+% the user to call with strings
+for i = 1:length(varargin)
+    if isstring(varargin{i})
+        varargin{i} = char(varargin{i});
+    end
+end
 
 % Note:
 % This function requires dtTonalAnnotate.fig to be present and uses