What format is y in y=wavread('file')? Difficulty in finding peaks of a wav file as y is not a vector.

Question

Achyuth 2014-7-14

关闭： MATLAB Answer Bot 2021-8-20

I have been trying to find the peaks of a wav file but stuck with this error.

Error using findpeaks Expected X to be a vector.

Error in findpeaks>parse_inputs (line 54) validateattributes(X,{'numeric'},{'nonempty','real','vector'},...

Error in findpeaks (line 43) [X,Ph,Pd,Th,Np,Str,infIdx] = parse_inputs(X,varargin{:});

Error in ab (line 23) [pks,locs] = findpeaks(xn);

Error in run (line 57) evalin('caller', [s ';']);

I have used wavread as follows:

i = 88200; j = 352800; samples = [i, j]; [xn fs]=wavread('/media/file.wav',samples); t=[1/fs:1/fs:length(xn)/fs];

Please help.

Answer 1

Jos (10584) 2014-7-14

what does

size(xn)

returns? It might be N-by-2 for stereo wave files