function varargout = DSP_Equalizer(varargin)
% DSP_EQUALIZER MATLAB code for DSP_Equalizer.fig
%      DSP_EQUALIZER, by itself, creates a new DSP_EQUALIZER or raises the existing
%      singleton*.
%
%      H = DSP_EQUALIZER returns the handle to a new DSP_EQUALIZER or the handle to
%      the existing singleton*.
%
%      DSP_EQUALIZER('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in DSP_EQUALIZER.M with the given input arguments.
%
%      DSP_EQUALIZER('Property','Value',...) creates a new DSP_EQUALIZER or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before DSP_Equalizer_OpeningFcn gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to DSP_Equalizer_OpeningFcn via varargin.
%
%      *See GUI Options on GUIDE's Tools menu.  Choose "GUI allows only one
%      instance to run (singleton)".
%
% See also: GUIDE, GUIDATA, GUIHANDLES

% Edit the above text to modify the response to help DSP_Equalizer

% Last Modified by GUIDE v2.5 13-May-2019 22:10:28

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @DSP_Equalizer_OpeningFcn, ...
                   'gui_OutputFcn',  @DSP_Equalizer_OutputFcn, ...
                   'gui_LayoutFcn',  [] , ...
                   'gui_Callback',   []);
if nargin && ischar(varargin{1})
    gui_State.gui_Callback = str2func(varargin{1});
end

if nargout
    [varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
else
    gui_mainfcn(gui_State, varargin{:});
end
% End initialization code - DO NOT EDIT


% --- Executes just before DSP_Equalizer is made visible.
function DSP_Equalizer_OpeningFcn(hObject, eventdata, handles, varargin)
% This function has no output args, see OutputFcn.
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% varargin   command line arguments to DSP_Equalizer (see VARARGIN)

% Choose default command line output for DSP_Equalizer
global C Fs;

Fs=str2double(get(handles.samplefreq,'string'));
if isempty(Fs)
    Fs = 40000;
    set(handles.samplefreq,'string',40000)
end
C=zeros(1,9);
set(handles.slider1,'min',-25);
set(handles.slider1,'max',25);
set(handles.slider1,'value',0);
set(handles.slider1,'SliderStep',[0.025,0.05]);
set(handles.slider1,'string',num2str(0));

set(handles.slider2,'min',-25);
set(handles.slider2,'max',25);
set(handles.slider2,'value',0);
set(handles.slider2,'SliderStep',[0.025,0.05]);
set(handles.slider2,'string',num2str(0));

set(handles.slider3,'min',-25);
set(handles.slider3,'max',25);
set(handles.slider3,'value',0);
set(handles.slider3,'SliderStep',[0.025,0.05]);
set(handles.slider3,'string',num2str(0));

set(handles.slider4,'min',-25);
set(handles.slider4,'max',25);
set(handles.slider4,'value',0);
set(handles.slider4,'SliderStep',[0.025,0.05]);
set(handles.slider4,'string',num2str(0));

set(handles.slider5,'min',-25);
set(handles.slider5,'max',25);
set(handles.slider5,'value',0);
set(handles.slider5,'SliderStep',[0.025,0.05]);
set(handles.slider5,'string',num2str(0));

set(handles.slider6,'min',-25);
set(handles.slider6,'max',25);
set(handles.slider6,'value',0);
set(handles.slider6,'SliderStep',[0.025,0.05]);
set(handles.slider6,'string',num2str(0));

set(handles.slider7,'min',-25);
set(handles.slider7,'max',25);
set(handles.slider7,'value',0);
set(handles.slider7,'SliderStep',[0.025,0.05]);
set(handles.slider7,'string',num2str(0));

set(handles.slider8,'min',-25);
set(handles.slider8,'max',25);
set(handles.slider8,'value',0);
set(handles.slider8,'SliderStep',[0.025,0.05]);
set(handles.slider8,'string',num2str(0));

set(handles.slider9,'min',-25);
set(handles.slider9,'max',25);
set(handles.slider9,'value',0);
set(handles.slider9,'SliderStep',[0.025,0.05]);
set(handles.slider9,'string',num2str(0));

set(handles.gain1,'enable','off')
set(handles.gain2,'enable','off')
set(handles.gain3,'enable','off')
set(handles.gain4,'enable','off')
set(handles.gain5,'enable','off')
set(handles.gain6,'enable','off')
set(handles.gain7,'enable','off')
set(handles.gain8,'enable','off')
set(handles.gain9,'enable','off')
set(handles.gain1,'string','1')
set(handles.gain2,'string','1')
set(handles.gain3,'string','1')
set(handles.gain4,'string','1')
set(handles.gain5,'string','1')
set(handles.gain6,'string','1')
set(handles.gain7,'string','1')
set(handles.gain8,'string','1')
set(handles.gain9,'string','1')

set(handles.pop1,'enable','off')
set(handles.playinputbutton,'enable','off')
set(handles.playoutputbutton,'enable','off')
set(handles.savebutton,'enable','off')
set(handles.inputplotbutton,'enable','off')
set(handles.outputplotbutton,'enable','off')
set(handles.analyzebutton,'enable','off')
set(handles.samplefreq,'enable','off')
axes(handles.inputplot_time);
title('Input: Time Domain');
grid on;
axes(handles.inputplot_freq);
title('Input: Frequency Domain');
grid on;
axes(handles.outputplot_time);
title('Output: Time Domain');
grid on;
axes(handles.outputplot_freq);
title('Output: Frequency Domain');
grid on;

handles.output = hObject;

% Update handles structure
guidata(hObject, handles);

% UIWAIT makes DSP_Equalizer wait for user response (see UIRESUME)
% uiwait(handles.figure1);


% --- Outputs from this function are returned to the command line.
function varargout = DSP_Equalizer_OutputFcn(hObject, eventdata, handles)
% varargout  cell array for returning output args (see VARARGOUT);
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Get default command line output from handles structure
varargout{1} = handles.output;


% --- Executes on slider movement.
function slider1_Callback(hObject, eventdata, handles)
% hObject    handle to slider1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'Value') returns position of slider
%        get(hObject,'Min') and get(hObject,'Max') to determine range of slider
global C;
C(1)=get(hObject,'value');
set(handles.gain1,'string',num2str(C(1)));



% --- Executes during object creation, after setting all properties.
function slider1_CreateFcn(hObject, eventdata, handles)
% hObject    handle to slider1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: slider controls usually have a light gray background.
if isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor',[.9 .9 .9]);
end


% --- Executes on slider movement.
function slider2_Callback(hObject, eventdata, handles)
% hObject    handle to slider2 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'Value') returns position of slider
%        get(hObject,'Min') and get(hObject,'Max') to determine range of slider
global C;
C(2)=get(hObject,'value');
set(handles.gain2,'string',num2str(C(2)));


% --- Executes during object creation, after setting all properties.
function slider2_CreateFcn(hObject, eventdata, handles)
% hObject    handle to slider2 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: slider controls usually have a light gray background.
if isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor',[.9 .9 .9]);
end


% --- Executes on slider movement.
function slider3_Callback(hObject, eventdata, handles)
% hObject    handle to slider3 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'Value') returns position of slider
%        get(hObject,'Min') and get(hObject,'Max') to determine range of slider
global C;
C(3)=get(hObject,'value');
set(handles.gain3,'string',num2str(C(3)));


% --- Executes during object creation, after setting all properties.
function slider3_CreateFcn(hObject, eventdata, handles)
% hObject    handle to slider3 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: slider controls usually have a light gray background.
if isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor',[.9 .9 .9]);
end


% --- Executes on slider movement.
function slider4_Callback(hObject, eventdata, handles)
% hObject    handle to slider4 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'Value') returns position of slider
%        get(hObject,'Min') and get(hObject,'Max') to determine range of slider
global C;
C(4)=get(hObject,'value');
set(handles.gain4,'string',num2str(C(4)));


% --- Executes during object creation, after setting all properties.
function slider4_CreateFcn(hObject, eventdata, handles)
% hObject    handle to slider4 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: slider controls usually have a light gray background.
if isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor',[.9 .9 .9]);
end


% --- Executes on slider movement.
function slider5_Callback(hObject, eventdata, handles)
% hObject    handle to slider5 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'Value') returns position of slider
%        get(hObject,'Min') and get(hObject,'Max') to determine range of slider
global C;
C(5)=get(hObject,'value');
set(handles.gain5,'string',num2str(C(5)));


% --- Executes during object creation, after setting all properties.
function slider5_CreateFcn(hObject, eventdata, handles)
% hObject    handle to slider5 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: slider controls usually have a light gray background.
if isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor',[.9 .9 .9]);
end


% --- Executes on slider movement.
function slider6_Callback(hObject, eventdata, handles)
% hObject    handle to slider6 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'Value') returns position of slider
%        get(hObject,'Min') and get(hObject,'Max') to determine range of slider
global C;
C(6)=get(hObject,'value');
set(handles.gain6,'string',num2str(C(6)));


% --- Executes during object creation, after setting all properties.
function slider6_CreateFcn(hObject, eventdata, handles)
% hObject    handle to slider6 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: slider controls usually have a light gray background.
if isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor',[.9 .9 .9]);
end


% --- Executes on slider movement.
function slider7_Callback(hObject, eventdata, handles)
% hObject    handle to slider7 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'Value') returns position of slider
%        get(hObject,'Min') and get(hObject,'Max') to determine range of slider
global C;
C(7)=get(hObject,'value');
set(handles.gain7,'string',num2str(C(7)));


% --- Executes during object creation, after setting all properties.
function slider7_CreateFcn(hObject, eventdata, handles)
% hObject    handle to slider7 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: slider controls usually have a light gray background.
if isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor',[.9 .9 .9]);
end


% --- Executes on slider movement.
function slider8_Callback(hObject, eventdata, handles)
% hObject    handle to slider8 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'Value') returns position of slider
%        get(hObject,'Min') and get(hObject,'Max') to determine range of slider
global C;
C(8)=get(hObject,'value');
set(handles.gain8,'string',num2str(C(8)));


% --- Executes during object creation, after setting all properties.
function slider8_CreateFcn(hObject, eventdata, handles)
% hObject    handle to slider8 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: slider controls usually have a light gray background.
if isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor',[.9 .9 .9]);
end


% --- Executes on slider movement.
function slider9_Callback(hObject, eventdata, handles)
% hObject    handle to slider9 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'Value') returns position of slider
%        get(hObject,'Min') and get(hObject,'Max') to determine range of slider
global C;
C(9)=get(hObject,'value');
set(handles.gain9,'string',num2str(C(9)));


% --- Executes during object creation, after setting all properties.
function slider9_CreateFcn(hObject, eventdata, handles)
% hObject    handle to slider9 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: slider controls usually have a light gray background.
if isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor',[.9 .9 .9]);
end


% --- Executes on selection change in pop1.
function pop1_Callback(hObject, eventdata, handles)
% hObject    handle to pop1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: contents = cellstr(get(hObject,'String')) returns pop1 contents as cell array
%        contents{get(hObject,'Value')} returns selected item from pop1


% --- Executes during object creation, after setting all properties.
function pop1_CreateFcn(hObject, eventdata, handles)
% hObject    handle to pop1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: popupmenu controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end


% --- Executes on selection change in pop2.
function pop2_Callback(hObject, eventdata, handles)
% hObject    handle to pop2 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: contents = cellstr(get(hObject,'String')) returns pop2 contents as cell array
%        contents{get(hObject,'Value')} returns selected item from pop2


% --- Executes during object creation, after setting all properties.
function pop2_CreateFcn(hObject, eventdata, handles)
% hObject    handle to pop2 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: popupmenu controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end


% --- Executes on selection change in pop3.
function pop3_Callback(hObject, eventdata, handles)
% hObject    handle to pop3 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: contents = cellstr(get(hObject,'String')) returns pop3 contents as cell array
%        contents{get(hObject,'Value')} returns selected item from pop3


% --- Executes during object creation, after setting all properties.
function pop3_CreateFcn(hObject, eventdata, handles)
% hObject    handle to pop3 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: popupmenu controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end


% --- Executes on selection change in pop4.
function pop4_Callback(hObject, eventdata, handles)
% hObject    handle to pop4 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: contents = cellstr(get(hObject,'String')) returns pop4 contents as cell array
%        contents{get(hObject,'Value')} returns selected item from pop4


% --- Executes during object creation, after setting all properties.
function pop4_CreateFcn(hObject, eventdata, handles)
% hObject    handle to pop4 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: popupmenu controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end


% --- Executes on selection change in pop5.
function pop5_Callback(hObject, eventdata, handles)
% hObject    handle to pop5 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: contents = cellstr(get(hObject,'String')) returns pop5 contents as cell array
%        contents{get(hObject,'Value')} returns selected item from pop5


% --- Executes during object creation, after setting all properties.
function pop5_CreateFcn(hObject, eventdata, handles)
% hObject    handle to pop5 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: popupmenu controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end


% --- Executes on selection change in pop6.
function pop6_Callback(hObject, eventdata, handles)
% hObject    handle to pop6 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: contents = cellstr(get(hObject,'String')) returns pop6 contents as cell array
%        contents{get(hObject,'Value')} returns selected item from pop6


% --- Executes during object creation, after setting all properties.
function pop6_CreateFcn(hObject, eventdata, handles)
% hObject    handle to pop6 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: popupmenu controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end


% --- Executes on selection change in pop7.
function pop7_Callback(hObject, eventdata, handles)
% hObject    handle to pop7 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: contents = cellstr(get(hObject,'String')) returns pop7 contents as cell array
%        contents{get(hObject,'Value')} returns selected item from pop7


% --- Executes during object creation, after setting all properties.
function pop7_CreateFcn(hObject, eventdata, handles)
% hObject    handle to pop7 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: popupmenu controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end


% --- Executes on selection change in pop8.
function pop8_Callback(hObject, eventdata, handles)
% hObject    handle to pop8 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: contents = cellstr(get(hObject,'String')) returns pop8 contents as cell array
%        contents{get(hObject,'Value')} returns selected item from pop8


% --- Executes during object creation, after setting all properties.
function pop8_CreateFcn(hObject, eventdata, handles)
% hObject    handle to pop8 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: popupmenu controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end


% --- Executes on selection change in pop9.
function pop9_Callback(hObject, eventdata, handles)
% hObject    handle to pop9 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: contents = cellstr(get(hObject,'String')) returns pop9 contents as cell array
%        contents{get(hObject,'Value')} returns selected item from pop9


% --- Executes during object creation, after setting all properties.
function pop9_CreateFcn(hObject, eventdata, handles)
% hObject    handle to pop9 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: popupmenu controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end


% --- Executes on button press in loadbutton.
function loadbutton_Callback(hObject, eventdata, handles)
% hObject    handle to loadbutton (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global file_name;
[filename, pathname]  = uigetfile('*wav','Load a .wav file');
file_name = strcat(pathname,filename)
Nowplaying = strcat('Now Playing: ',filename)
if ~isempty(file_name)
    set(handles.gain1,'enable','on')
    set(handles.gain2,'enable','on')
    set(handles.gain3,'enable','on')
    set(handles.gain4,'enable','on')
    set(handles.gain5,'enable','on')
    set(handles.gain6,'enable','on')
    set(handles.gain7,'enable','on')
    set(handles.gain8,'enable','on')
    set(handles.gain9,'enable','on')
    set(handles.pop1,'enable','on')
    set(handles.playinputbutton,'enable','on')
    set(handles.playoutputbutton,'enable','on')
    set(handles.savebutton,'enable','on')
    set(handles.inputplotbutton,'enable','on')
    set(handles.outputplotbutton,'enable','on')
    set(handles.analyzebutton,'enable','on')
    set(handles.samplefreq,'enable','on')
    set(handles.filename,'string',Nowplaying)
end



% --- Executes on button press in playinputbutton.
function playinputbutton_Callback(hObject, eventdata, handles)
% hObject    handle to playinputbutton (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global file_name;
[y,Fs]=audioread(file_name);
sound(y,Fs);

% --- Executes on button press in inputplotbutton.
function inputplotbutton_Callback(hObject, eventdata, handles)
% hObject    handle to inputplotbutton (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global file_name;
[y,Fs]=audioread(file_name);
y = y(:,1);
s_length = length(y);
frameSize = fix(y*0.001*Fs);
dt = 1/Fs;
t = 0:dt:(length(y)*dt)-dt;
axes(handles.inputplot_time);
plot(t,y);
grid on;
xlabel('Seconds');
ylabel('Amplitude');
axes(handles.inputplot_freq);
plot(psd(spectrum.periodogram,y,'Fs',Fs,'NFFT',length(y)));

% --- Executes on button press in outputplotbutton.
function outputplotbutton_Callback(hObject, eventdata, handles)
% hObject    handle to outputplotbutton (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global file_name C;
[x,Fs]=audioread(file_name);
dt = 1/Fs;
allItems = handles.pop1.String;     % A cell array of all strings in the popup.
selectedIndex = handles.pop1.Value; % An integer saying which item has been selected.
selectedfilter = allItems{selectedIndex};
if strcmp(selectedfilter, 'IIR') == 1
    [a,b]=coef();
    foo=2*Fs;
    Nb=round(length(x)/foo);
    y=0;
    for i=1:floor(Nb)
        part=x((i-1)*foo+1:i*foo);
        for k=1:9
            y=[y filter(C(k)*b{k},a{k},part)];
        end
        t = 0:dt:(length(y)*dt)-dt;
        axes(handles.outputplot_time);
        plot(t,y);
        grid on;
        xlabel('Seconds');
        ylabel('Amplitude');
        axes(handles.outputplot_freq);
        plot(psd(spectrum.periodogram,y,'Fs',Fs,'NFFT',length(y)));
        y=0;
        grid on;
    end
end

function [a,b]=coef()
global Fs;
%Filter 1
Rp1 = 0.5;
Rs1 = 30;
Fp1 = 170/(Fs/2)
Fs1 = 200/(Fs/2)
n1 = cheb1ord(Fp1,Fs1,Rp1,Rs1);
[b1,a1] = cheby1(n1,Rp1,Fp1,'low');
%Filter 2
Rp2=0.5;
Rs2=30;
Fp2=[170,310]/(Fs/2);
Fs2=[100,390]/(Fs/2);
n2=cheb1ord(Fp2,Fs2,Rp2,Rs2);
[b2,a2]=cheby1(n2,Rp2,Fp2);
%Filter 3
Rp3=0.5;
Rs3=30;
Fp3=[310,600]/(Fs/2);
Fs3=[250,640]/(Fs/2);
n3=cheb2ord(Fp3,Fs3,Rp3,Rs3);
[b3,a3]=cheby2(n3,Rp3,Fp3);
%Filter 4
Rp4=0.5;
Rs4=30;
Fp4=[600,1000]/(Fs/2);
Fs4=[400,1100]/(Fs/2);
n4=cheb2ord(Fp4,Fs4,Rp4,Rs4);
[b4,a4]=cheby2(n4,Rp4,Fp4);
%Filter 5
Rp5=0.5;
Rs5=30;
Fp5=[1000,3000]/(Fs/2);
Fs5=[800,3200]/(Fs/2);
n5=cheb2ord(Fp5,Fs5,Rp5,Rs5);
[b5,a5]=cheby2(n5,Rp5,Fp5);
%Filter 6
Rp6=0.5;
Rs6=30;
Fp6=[3000,6000]/(Fs/2);
Fs6=[2960,6040]/(Fs/2);
n6=cheb2ord(Fp6,Fs6,Rp6,Rs6);
[b6,a6]=cheby2(n6,Rp6,Fp6);
%Filter 7
Rp7=0.5;
Rs7=30;
Fp7=[6000,12000]/(Fs/2);
Fs7=[5500,12500]/(Fs/2);
n7=cheb2ord(Fp7,Fs7,Rp7,Rs7);
[b7,a7]=cheby2(n7,Rp7,Fp7);
%Filter 8
Rp8=0.5;
Rs8=30;
Fp8=[12000,14000]/(Fs/2);
Fs8=[10000,17000]/(Fs/2);
n8=cheb2ord(Fp8,Fs8,Rp8,Rs8);
[b8,a8]=cheby2(n8,Rp8,Fp8);
%Filter 9
Rp9=0.5;
Rs9=30;
Fp9=16000/(Fs/2);
Fs9=16500/(Fs/2);
n9=cheb2ord(Fp9,Fs9,Rp9,Rs9);
[b9,a9]=cheby2(n9,Rp9,Fp9,'high');

a = {a1,a2,a3,a4,a5,a6,a7,a8,a9};
b = {b1,b2,b3,b4,b5,b6,b7,b8,b9};


% --- Executes on button press in savebutton.
function savebutton_Callback(hObject, eventdata, handles)
% hObject    handle to savebutton (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)


% --- Executes on button press in analyzebutton.
function analyzebutton_Callback(hObject, eventdata, handles)
% hObject    handle to analyzebutton (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)


% --- Executes on button press in playoutputbutton.
function playoutputbutton_Callback(hObject, eventdata, handles)
% hObject    handle to playoutputbutton (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global file_name C;
[x,Fs]=audioread(file_name);
allItems = handles.pop1.String;     % A cell array of all strings in the popup.
selectedIndex = handles.pop1.Value; % An integer saying which item has been selected.
selectedfilter = allItems{selectedIndex};
if strcmp(selectedfilter, 'IIR') == 1
    [a,b]=coef();
    foo=2*Fs;
    Nb=round(length(x)/foo);
    y=0;
    for i=1:floor(Nb)
        part=x((i-1)*foo+1:i*foo);
        for k=1:9
            y=y+filter(C(k)*b{k},a{k},part);
        end
        sound(y,Fs);
        y=0;
    end
end




function samplefreq_Callback(hObject, eventdata, handles)
% hObject    handle to samplefreq (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of samplefreq as text
%        str2double(get(hObject,'String')) returns contents of samplefreq as a double


% --- Executes during object creation, after setting all properties.
function samplefreq_CreateFcn(hObject, eventdata, handles)
% hObject    handle to samplefreq (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end



function gain1_Callback(hObject, eventdata, handles)
% hObject    handle to gain1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of gain1 as text
%        str2double(get(hObject,'String')) returns contents of gain1 as a double


% --- Executes during object creation, after setting all properties.
function gain1_CreateFcn(hObject, eventdata, handles)
% hObject    handle to gain1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end



function gain2_Callback(hObject, eventdata, handles)
% hObject    handle to gain2 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of gain2 as text
%        str2double(get(hObject,'String')) returns contents of gain2 as a double


% --- Executes during object creation, after setting all properties.
function gain2_CreateFcn(hObject, eventdata, handles)
% hObject    handle to gain2 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end



function gain3_Callback(hObject, eventdata, handles)
% hObject    handle to gain3 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of gain3 as text
%        str2double(get(hObject,'String')) returns contents of gain3 as a double


% --- Executes during object creation, after setting all properties.
function gain3_CreateFcn(hObject, eventdata, handles)
% hObject    handle to gain3 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end



function gain4_Callback(hObject, eventdata, handles)
% hObject    handle to gain4 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of gain4 as text
%        str2double(get(hObject,'String')) returns contents of gain4 as a double


% --- Executes during object creation, after setting all properties.
function gain4_CreateFcn(hObject, eventdata, handles)
% hObject    handle to gain4 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end



function gain5_Callback(hObject, eventdata, handles)
% hObject    handle to gain5 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of gain5 as text
%        str2double(get(hObject,'String')) returns contents of gain5 as a double


% --- Executes during object creation, after setting all properties.
function gain5_CreateFcn(hObject, eventdata, handles)
% hObject    handle to gain5 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end



function gain6_Callback(hObject, eventdata, handles)
% hObject    handle to gain6 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of gain6 as text
%        str2double(get(hObject,'String')) returns contents of gain6 as a double


% --- Executes during object creation, after setting all properties.
function gain6_CreateFcn(hObject, eventdata, handles)
% hObject    handle to gain6 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end



function gain7_Callback(hObject, eventdata, handles)
% hObject    handle to gain7 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of gain7 as text
%        str2double(get(hObject,'String')) returns contents of gain7 as a double


% --- Executes during object creation, after setting all properties.
function gain7_CreateFcn(hObject, eventdata, handles)
% hObject    handle to gain7 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end



function gain8_Callback(hObject, eventdata, handles)
% hObject    handle to gain8 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of gain8 as text
%        str2double(get(hObject,'String')) returns contents of gain8 as a double


% --- Executes during object creation, after setting all properties.
function gain8_CreateFcn(hObject, eventdata, handles)
% hObject    handle to gain8 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end



function gain9_Callback(hObject, eventdata, handles)
% hObject    handle to gain9 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of gain9 as text
%        str2double(get(hObject,'String')) returns contents of gain9 as a double


% --- Executes during object creation, after setting all properties.
function gain9_CreateFcn(hObject, eventdata, handles)
% hObject    handle to gain9 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end