length of audio sample

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God'sSon
God'sSon 2011-4-7
评论： Mayur Gudi 2020-2-22
hello!
I am trying to import an audio sample into matlab and get matlab to tell me the length of the sample. Please can someone help me with this ,
cheers.

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采纳的回答

Paulo Silva
Paulo Silva 2011-4-7
Just in case you got a wave file
[y, Fs, nbits] = wavread(filename) %load the wav
[m d] = wavfinfo(filename) %get the wav information
Another way to get the length in seconds is:
siz = wavread(filename,'size') %siz = [samples channels]
siz(1)/Fs %should give you the length in seconds
  1 个评论
Mayur Gudi
Mayur Gudi 2020-2-22
I did this. But for a file of 500 ms. It is showing length as 23664 after dividing by 44100 we get 0.5365 which means 536 ms approx How is this possible !!? From where did this extra 36 ms come from ?
I tried with a file of exactly 2 seconds there also it showed 2.something. Why length is shown more than actual ?

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更多回答（6 个）

Yared Andarge
Yared Andarge 2018-12-6
[y,Fs] = audioread('yared.wav'); % y samples from audio with Fs sampling frequency in [Hz].
sound(y,Fs);% listen your audio input
N = length(y); % sample lenth
slength = N/Fs; % total time span of audio signal
t = linspace(0, N/Fs, N);
plot(t, y); % pplots the audio
Neuron
Neuron 2014-10-16
Is it really N/Fs or maybe (N-1)/Fs ? (N: number of samples)
I mean, 1 sample has what? 1/Fs duration? I think 2 samples should have 1/Fs (the minimum duration). We also use to plot it like [0:N-1] in the x-axis and not like [0:N] or [1:N]. Then, taking [0:N-1]/Fs really matches the duration if you notice. The right end is (N-1)/Fs.
Laura Proctor
Laura Proctor 2011-4-7
You can import the data using an audio import function such as WAVREAD or AUREAD or even by using the Import Wizard by selecting File > Import Data. This will bring in your audio sample. You can see the number of elements in the variable you brought in by using the LENGTH function. However, if you want the timing length, then you will need to divide this number by the sampling frequency.
shaik
shaik 2014-8-19
can any one tell how to change the default frame size of 1024 of audio signal to required frames size (1024*x) where x is a multiple of 2.
haroon urd
haroon urd 2016-11-29
for length of an audio signal [x,fs]=wavread('filename.wav'); len=length(x); //length of an audio signal to=len/fs;// the total time of audio signal sound(x,fs);//play sound file for t=0:1:to set(handles.edit1,'string',num2str(t));//that will display the time duration of audiosignal
pause(1); end
  1 个评论
Maria Sheeba
Maria Sheeba 2017-4-12
I want to know simultaneously both the audio length and the frame size and also how to determine the sound pressure level for a particular audio using a matlab. Can anyone help me in this?
Thank You

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sufyan masood
sufyan masood 2018-8-18
hello can any one tell about sparsify subband signal and subband modification of subband signals coeffiects in compressive signal. kindly guide me about it. i will be highly thankful to all for help me counter this problem.

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