7/26/2019 Wavread Function
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ead :: Functions (MATLAB)
jar:file:///C:/Program%20Files/MATLAB/R2011a/help/techdoc/h
9/29/2014
wavreadRead WAVE (.wav) sound file
Alternatives
As an alternative to wavread, use the Import Wizard. To activate
the Import Wizard, select File> Import Data.
Syntax
y= wavread(filename)[y, Fs] = wavread(filename)
[y, Fs, nbits] = wavread(filename)
[y, Fs, nbits, opts] = wavread(filename)
[...] = wavread(filename, N)
[...] = wavread(filename, [N1N2])
[...] = wavread(..., fmt)
siz= wavread(filename,'size')
Description
y= wavread(filename)loads a WAVE file specified by the string
filename, returning the sampled data in y. Iffilenamedoes not
include an extension, wavreadappends .wav.
[y, Fs] = wavread(filename)returns the sample rate (Fs) in Hertz
used to encode the data in the file.
[y, Fs, nbits] = wavread(filename)returns the number of bits per
sample (nbits).
[y, Fs, nbits, opts] = wavread(filename)returns a structure
optsof additional information contained in theWAV file. The content
of this structure differs from file to file. Typical structure
fields include opts.fmt(audio formatinformation) and opts.info(text
that describes the title, author, etc.).
[...] = wavread(filename, N)returns only the first Nsamples from
each channel in the file.
[...] = wavread(filename, [N1N2])returns only samples N1through
N2from each channel in the f ile.
[...] = wavread(..., fmt)specifies the data format of yused to
represent samples read from the file. fmtcan beeither of the
following values, or a partial match (case-insensitive):
'double' Double-precision normalized samples (default).
'native' Samples in the native data type found in the file.
siz= wavread(filename,'size')returns the size of the audio data
contained in filenameinstead of the actualaudio data, returning the
vector siz= [sampleschannels].
Output Scaling
The range of values in ydepends on the data format fmtspecified.
Some examples of output scaling based on typicalbit-widths found in
a WAV file are given below for both 'double'and
'native'formats.
Native Formats
Number of Bits MATLAB Data Type Data Range
8 uint8(unsigned integer) 0
