I NEED HELP WITH THIS CODE?
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Index exceeds matrix dimensions.
Error in ==> wavplay at 56 y = varargin{1};
Error in ==> Untitled at 22 wavplay('Bird') >> clear; clc;
M=2;
freq_sep=100;
nsamp=6;
sampling_frequency=1000;
id=fopen('bird.wav');
data=fread(id,inf,'uint8');
data_bin=de2bi(data);
fsk_mod=fskmod(data_bin,M,freq_sep,nsamp,sampling_frequency);
noise=awgn(fsk_mod,10);
fsk_demod=fskdemod(noise,M,freq_sep,nsamp,sampling_frequency);
[num,rate]=biterr(data_bin,fsk_demod)
z=bi2de(fsk_demod);
a=uint8(z);
wavwrite(a,'Bird');
wavplay('Bird')
2 commentaires
Walter Roberson
le 14 Mai 2012
Why are you reading the bird.wav file as binary? .wav files do not encode the sound as plain binary samples: they have a lot of compression, and should be read using wavread()
Réponses (1)
Walter Roberson
le 15 Mai 2012
wavplay(y,Fs) plays the audio signal stored in the vector y on a PC-based audio output device. Fs is the integer sample rate in Hz (samples per second). The default value for Fs is 11025 Hz. wavplay supports only 1- or 2-channel (mono or stereo) audio signals. To play in stereo, y must be a two-column matrix.
It does not appear to me that 'Bird' is a audio signal.
To be more explicit: wavplay() does not accept filenames. There is no MATLAB supplied routine for playing sound directly out of .wav files.
2 commentaires
Walter Roberson
le 16 Mai 2012
No. sound() always waits for the noise to finish. wavplay() has an option to continue one the noise has started. Also, wavplay() can only be used for 32 bit MS Windows systems.
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