通过Matlab GUI读取音频文件

4 回答

• 1

  wavread 将文件名作为第一个参数 . 由于 audio 不是当前路径中的文件（或者可能不是您想要的路径），因此您不能将其作为第一个参数 .

  但变量 audio 保存信号本身，因此您不需要再访问文件本身 . 然后，同时初始化 fs ：

  [audio,fs] = wavread(fullpathname);
  

  然后，如果您需要获取信号的一部分，只需获取一部分：

  x = audio(24120 25930);
  

  对于绘图，在GUI中添加轴并使用这些轴的句柄作为第一个参数调用 plot （Matlab的文档中充满了示例:)） .

  回复于 2024-04-29T06:33:33+08:00
• 0

  [data，fs] = wavread（filename）;

  x =数据（24120：25930）;

  ％来绘制数据

  情节（handles.axes1，T，X）;

  %%假设您没有更改轴的句柄名称

  回复于 2024-04-29T06:33:33+08:00
• 0

  我试过你的建议，我写的是这样的：

  % --- Executes on button press in pushbutton1.
      function pushbutton1_Callback(hObject, eventdata, handles)
      % hObject    handle to pushbutton1 (see GCBO)
      % eventdata  reserved - to be defined in a future version of MATLAB
      % handles    structure with handles and user data (see GUIDATA)
      [filename pathname] = uigetfile({'*.wav'}, 'Select File');
      fullpathname = strcat (pathname, filename);
      [data,fs] = wavread(filename);
  
  
  
      % --- Executes on button press in pushbutton2.
      function pushbutton2_Callback(hObject, eventdata, handles)
      % hObject    handle to pushbutton2 (see GCBO)
      % eventdata  reserved - to be defined in a future version of MATLAB
      % handles    structure with handles and user data (see GUIDATA)
      %MODEL
      % get a section of vowel
      x = data(24120:25930);
      ms20=fs/50; % minimum speech Fx at 50Hz
      %
      % plot waveform
      t=(0:length(x)-1)/fs; % times of sampling instants
      subplot(2,1,1);
      plot(t,x);
      legend('Waveform');
      xlabel('Time (s)');
      ylabel('Amplitude');
      plot(handles.axes1,t,x);
      %
      % calculate autocorrelation
      r=xcorr(x,ms20,'coeff');
      %
      % plot autocorrelation
      d=(-ms20:ms20)/fs; % times of delays
      subplot(2,1,2);
      plot(d,r);
      legend('Autocorrelation');
      xlabel('Delay (s)');
      ylabel('Correlation coeff.');
      plot(handles.axes2,d,r);
      ms2=fs/500 % maximum speech Fx at 500Hz
      ms20=fs/50 % minimum speech Fx at 50Hz
      % just look at region corresponding to positive delays
      r=r(ms20+1:2*ms20+1)
      [rmax,tx]=max(r(ms2:ms20))
      fprintf('rmax=%g Fx=%gHz\n',rmax,fs/(ms2+tx-1));
  

  但我得到以下错误：

  ?? Undefined function or method 'data' for input arguments of type 'double'.
  
  Error in ==> untitled>pushbutton2_Callback at 94
  x = data(24120:25930);
  
  Error in ==> gui_mainfcn at 96
          feval(varargin{:});
  
  Error in ==> untitled at 42
      gui_mainfcn(gui_State, varargin{:});
  
  Error in ==> @(hObject,eventdata)untitled('pushbutton2_Callback',hObject,eventdata,guidata(hObject))
  
  
  ??? Error while evaluating uicontrol Callback
  

  回复于 2024-04-29T06:33:33+08:00
• 0

  你的问题是变量ure给wavread读取，而不是 [data,fs] = wavread(filename); use:[data,fs] = wavread(fullpathname) . 它对我有用 .

  回复于 2024-04-29T06:33:33+08:00