Equalizer undefined variable problem

Question

Hassan Bosha 2019-2-24

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/446750-equalizer-undefined-variable-problem

评论： Walter Roberson 2019-2-25

function play_Callback(hObject, eventdata, handles)
% hObject    handle to play (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global stop file_name C;
stop=1;
equalizer_play();
function equalizer_play()
global stop file_name C;
[x,Fs]= audioread(file_name);
[a,b]=coef();
l_bucata=2*Fs;
Nb=round(length(x)/l_bucata);
y=0;
for i=1:floor(Nb)
    bucata=x((i-1)*l_bucata+1:i*l_bucata);
    for k=1:5
        y=y+filter(10^(C(k)/20)*b{k},a{k},bucata);
        if(stop==0)
            break;
        end     
    end
    wavplay(y,Fs,'async');
    y=0;
    if(stop==0)
        break;
    end   
end

> MyEqualizer

Undefined function or variable 'wavplay'.

Error in MyEqualizer>equalizer_play (line 507)

wavplay(y,Fs,'async');

Error in MyEqualizer>play_Callback (line 490)

equalizer_play();

Error in gui_mainfcn (line 95)

feval(varargin{:});

Error in MyEqualizer (line 42)

gui_mainfcn(gui_State, varargin{:});

Error while evaluating UIControl Callback.

What is the solution for such error ?

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Answer 1

Geoff Hayes 2019-2-24

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/446750-equalizer-undefined-variable-problem#answer_362507

Hassan - is code referencing wavplay from the File Exchange (the inputs seem to match)? If so, have you downloaded the code and added it to the MATLAB Search Path?