Matlab处理音频数据：助力音频处理的利器

在现代科学技术和数字媒体的世界中，音频处理是一项非常重要的任务。Matlab作为一种高级数学计算软件，可以为我们提供强有力的工具来处理和分析音频数据。因此，在本文中，我们将讨论关于Matlab处理音频数据的所有相关内容，包括Matlab提供的工具、技巧和使用这些工具的实现方法，以及Matlab音频处理的应用实例和技巧。

Matlab提供的音频数据处理工具

Matlab提供了许多内置函数和工具箱，可以用于音频处理。它们可以帮助我们读取、录制、分析、生成和重构音频信号。以下是其中一些工具：

Audioread和Audiowrite函数

这些函数是Matlab处理音频文件的基础。Audioread函数可以读取WAV、FLAC、MP3等音频格式的文件，并将其转换为Matlab中的一个音频结构体变量。相反，Audiowrite函数可以将Matlab中的处理结果保存为音频文件。

这里给出Audioread函数的帮助文档如下：

>> help Audioread
 audioread Read audio files
    [Y, FS]=audioread(FILENAME) reads an audio file specified by the 
    string FILE, returning the sampled data in Y and the sample rate 
    FS, in Hertz. 
    
    [Y, FS]=audioread(FILENAME, [START END]) returns only samples START 
    through END from each channel in the file.
    
    [Y, FS]=audioread(FILENAME, DATATYPE) specifies the data type format of
    Y used to represent samples read from the file.
    If DATATYPE='double', Y contains double-precision normalized samples.
    If DATATYPE='native', Y contains samples in the native data type
    found in the file.  Interpretation of DATATYPE is case-insensitive and
    partial matching is supported.
    If omitted, DATATYPE='double'.  
    
    [Y, FS]=audioread(FILENAME, [START END], DATATYPE);
 
    Output Data Ranges
    Y is returned as an m-by-n matrix, where m is the number of audio 
    samples read and n is the number of audio channels in the file.
 
    If you do not specify DATATYPE, or dataType is 'double', 
    then Y is of type double, and matrix elements are normalized values 
    between -1.0 and 1.0.
 
    If DATATYPE is 'native', then Y may be one of several MATLAB 
    data types, depending on the file format and the BitsPerSample 
    of the input file:
    
     File Format      BitsPerSample  Data Type of Y     Data Range of Y
     ----------------------------------------------------------------------
     WAVE (.wav)            8           uint8             0 <= Y <= 255
                           16           int16        -32768 <= Y <= 32767
                           24           int32         -2^32 <= Y <= 2^32-1
                           32           int32         -2^32 <= Y <= 2^32-1
                           32           single         -1.0 <= Y <= +1.0
     ----------------------------------------------------------------------
     FLAC (.flac)           8           uint8             0 <= Y <= 255
                           16           int16        -32768 <= Y <= 32767
                           24           int32         -2^32 <= Y <= 2^32-1
     ----------------------------------------------------------------------
     MP3 (.mp3)            N/A          single         -1.0 <= Y <= +1.0
     MPEG-4(.m4a,.mp4)
     OGG (.ogg)
     ----------------------------------------------------------------------
 
    Call audioinfo to learn the BitsPerSample of the file.
 
    Note that where Y is single or double and the BitsPerSample is 
    32 or 64, values in Y might exceed +1.0 or -1.0.

顺便给出一篇文章：《Matlab音频信号读取函数audioread》。