christopherh@1: %
christopherh@1: %NOTE2FIFTHPOSITION find note position on the line of fifths w.r.t. C=0
christopherh@1: % 
christopherh@1: % [noteposition, success, errormessage] = note2fifthposition(note,{verbose})
christopherh@1: % 
christopherh@1: % Converts a note string to a natural position on the line of fifths and its 
christopherh@1: % corresponding number of sharps or flats. Reference on line of fifths is C = 0.
christopherh@1: % 
christopherh@1: % Success = 1 if note converted correctly, 0 otherwise.
christopherh@1: % 
christopherh@1: % If optional argument 'verbose' is 1, function prints any errormessage to 
christopherh@1: % the screen.
christopherh@1: % 
christopherh@1: % calls: 	note2fifthinfo
christopherh@1: %
christopherh@1: % returns:  noteposistion (integer)
christopherh@1: %           success (boolean)
christopherh@1: %           errormessage (string)
christopherh@1: % 
christopherh@1: %
christopherh@1: % Author: Christopher Harte,  March 2009
christopherh@1: % 
christopherh@1: % Copyright: Centre for Digital Music, Queen Mary University of London 2005 
christopherh@1: %
christopherh@1: % This file is part of the C4DM Chord Toolkit V2.0  
christopherh@1: %
christopherh@1: % The C4DM Chord Toolkit is free software; you can redistribute it and/or 
christopherh@1: % modify it under the terms of the GNU General Public License as published 
christopherh@1: % by the Free Software Foundation; either version 2 of the License, or
christopherh@1: % (at your option) any later version.
christopherh@1: %
christopherh@1: % The C4DM Chord Toolkit is distributed in the hope that it will be useful,
christopherh@1: % but WITHOUT ANY WARRANTY; without even the implied warranty of
christopherh@1: % MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
christopherh@1: % GNU General Public License for more details.
christopherh@1: %
christopherh@1: % You should have received a copy of the GNU General Public License
christopherh@1: % along with the C4DM Toolkit; if not, write to the Free Software
christopherh@1: % Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
christopherh@1: 
christopherh@1: %		
christopherh@1: function [noteposition, success, errormessage] = note2fifthposition(note, verbose)
christopherh@1: 
christopherh@1: % set verbose default to 0
christopherh@1: if nargin < 3
christopherh@1:    verbose = 0;
christopherh@1: end
christopherh@1: 
christopherh@1: errormessage = '';
christopherh@1: success = 1;
christopherh@1: noteposition = '';
christopherh@1: 
christopherh@1: [notenatural, noteaccidentals, success1,errormessage] = note2fifthinfo(note);
christopherh@1: 
christopherh@1: if success
christopherh@1:     noteposition = notenatural + 7.*noteaccidentals -1;
christopherh@1: end        
christopherh@1:             
christopherh@1: if (success == 0) && (verbose == 1)   
christopherh@1:     fprintf(1,errormessage);
christopherh@1: end  
christopherh@1: