wavwrite - Write WAVE (.wav) sound file
Syntax
wavwrite(y,filename)
wavwrite(y,Fs,filename)
wavwrite(y,Fs,N,filename)
Description
wavwrite(y,filename) writes the data stored in the variable y to
a WAVE file called filename. The filename input
is a string enclosed in single quotes. The data has a sample rate
of 8000 Hz and is assumed to be 16-bit. Each column of the data represents
a separate channel. Therefore, stereo data should be specified as
a matrix with two columns.
wavwrite(y,Fs,filename) writes
the data stored in the variable y to a
WAVE file called filename. The data has
a sample rate of Fs Hz and is assumed to
be 16-bit.
wavwrite(y,Fs,N,filename) writes
the data stored in the variable y to a
WAVE file called filename. The data has
a sample rate of Fs Hz and is N-bit,
where N is 8, 16, 24, or 32.
Input Data Ranges
The range of values in y depends
on the number of bits specified by N and
the data type of y. The following tables
list the valid input ranges based on the value of N and
the data type of y.
If y contains integer data:
| N Bits | y
Data Type | y Data Range | Output Format |
|---|
| 8 | uint8 | 0 <= y <= 255 | uint8 |
| 16 | int16 | –32768 <= y <= +32767 | int16 |
| 24 | int32 | –2^23 <= y <= 2^23
– 1 | int32 |
If y contains floating-point
data:
| N Bits | y
Data Type | y Data Range | Output Format |
|---|
| 8 | single or double | –1.0 <= y < +1.0 | uint8 |
| 16 | single or double | –1.0 <= y < +1.0 | int16 |
| 24 | single or double | –1.0 <= y < +1.0 | int32 |
| 32 | single or double | –1.0 <= y <= +1.0 | single |
For floating point data where N < 32, amplitude values are clipped to the range –1.0
<= y < +1.0.
Note
8-, 16-, and 24-bit files are type 1 integer pulse code modulation
(PCM). 32-bit files are written as type 3 normalized floating point. |
See Also
auwrite, wavfinfo, wavplay, wavread, wavrecord
 | wavrecord | | web |  |
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