user interface - Matlab error when playing a sound -


i'm using matlab gui, i'm recording sound save in folder in c, display recorded sound in folder in listbox when press play on sound wav. matlab gives error error :

************error using audioread (line 74)** ***the filename specified not found in matlab path. error in monitoring_system>play_callback (line 178) [q, fs] = audioread(thisstring); error in gui_mainfcn (line 95)         feval(varargin{:}); error in monitoring_system (line 42)     gui_mainfcn(gui_state, varargin{:}); error in @(hobject,eventdata)monitoring_system('play_callback',hobject,eventdata,guidata(hobject))  error while evaluating uicontrol callback*************

-the record code:

format shortg              c = clock;              fix(c);              a=num2str(c);              year=strcat(a(1),a(2),a(3),a(4),a(5));              month=strcat(a(19),a(20));              day=strcat(a(33),a(34));              hour=strcat(a(48),a(49));              min=strcat(a(63),a(64));              sec=strcat(a(74),a(75));              name=strcat(year,'-',month,'-',day,'-',hour,'-',min,'-',sec);              fullpath=fullfile('c:\monitoringsystem',name);              wavwrite(y,44100,fullpath);              y=[];

the code diplay them in listbox:

d = dir('c:\monitoringsystem\*.wav'); %get files   set(handles.listbox1,'string',{d.name})

the code play sound chosen listbox:

allstrings = cellstr( get(handles.listbox1, 'string') ); curvalue = get(handles.listbox1, 'value'); thisstring = allstrings{curvalue}; [q, fs] = audioread(thisstring);  soundsc(q,44100);

any how solve problem, keeping save in specific folder. copied recorded sound matlab folder , pressed play in gui wav sound didin't give error.

did try debugging , seeing d contains after selecting file?

as per documentation, d = dir('c:\monitoringsystem\*.wav'); returns struct following fields: name, date,bytes, isdir, datenum (at least on matlab 2015a). although {d.name} gives filename correctly, should note relative path only, matlab doesn't file unless it's in active directory.

i'm not entirely sure why went through trouble allstrings, curvalue, , thisstring, if understand correctly you're trying do, suggest 1 of 2 approaches:

  1. define default path (i.e. c:\monitoringsystem) in constant, , use when saving\loading:

    default_path = `c:\monitoringsystem`; %// definition ... fullpath = fullfile(default_path,name); %// when saving ... d = dir(fullfile(default_path,'*.wav')); %// when listing files ... [q, fs] = audioread(fullfile(default_path,{d.name})); %// when reading file

  2. using uigetfile:

    [filename,pathname] = uigetfile('*.wav','select wav file'); fullpath = fullfile(pathname,filename);

    (and rest similar 1st case)


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