PySoundFile 入门

PySoundFile是一个Python模块，用于读取和写入音频文件，将音频文件视为NumPy数组，包括音高和所有内容。该模块可以读取音频文件，即它从音频（.wav 文件）中提取 NumPy 数组并能够写入它

安装：运行以下 pip 命令：

pip install PySoundFile 

PySoundFile 支持 libsndfile 支持的所有格式，例如 WAV、FLAC、OGG 和 MAT 文件

这是示例链接中使用的音频文件的链接

读取音频文件：

可以使用read()函数读取音频文件。

Syntax: read(file, frames=-1, start=0, stop=None, fill_value=None, samplerate=None, channels=None, subtype=None)

Parameters: 

• file: path of the audio file
• frames: This argument is used to specify number of frames to read, by default it has -1 value indicating whole file to read
• start, stop: To specify start and end to read audio file, By default whole file is read
• fill_value: If there is less data left in the file than requested, the rest of the frames are filled with fill_value. If no fill_value is specified, the smaller array is returned

Returns: 2 values

• data: numpy array ( length should be 44,100 elements) If returned is 1-D numpy array then audio read is mono channeled
• samplerate: sample rate (or “sampling rate”) defines how many times per second a sound is sampled.  Technically , it is the frequency of samples used in a digital recording. The standard sample rate used for audio CDs is 44.1 kilohertz for this file it is same too

支持的 文件格式：WAV、AIFF、AU、PAF、SVX、NIST、VOC、IRCAM、W64、MAT4、MAT5、PVF、XI、HTK、SDS、AVR、WAVEX、SD2、FLAC、CAF、WVE、OGG、MPC2K、RF64

示例：我们将读取以下文件：

Python3

# import the module
import soundfile as sf
  
# read the file
data, samplerate = sf.read('noice.wav')
  
# display the data
print(data)
print("---------------------")
print("Sample Rate is ", samplerate)
print("---------------------")
print("Done")

输出：

写入文件：我们可以使用write()函数写入文件。

Syntax: write(file, data, samplerate, subtype=None, endian=None, format=None, closefd=True)

Parameters: 

• file: path of the output file
• data: data to be written
• samplerate: sample rate of the audio data

Returns: Nothing

要写入音频文件，我们需要 NumPy 数组（即数据），因为采样率具有标准值，它以 wb 模式打开文件，即如果存在相同的名称，则程序将重写它 

示例：我们将读取以下文件：

蟒蛇3

# imporintg the module
import soundfile as sf
  
# reading the file
data, samplerate = sf.read('Sample.wav')
  
# writing the file
sf.write('writing_file_output.wav', data, samplerate)
  
# You may compare both audio, link is given in the output

输出：这是输出文件：