Error is wave file processing

[vipinv23]

Hello,

I am executing the following program for SE32_LE wave file format:

import wave
import matplotlib.pyplot as plt
import numpy as np

f = wave.open("M1F132.wav", "rb") #rb = read only

# (nchannels, sampwidth, framerate, nframes, comptype, compname)
params = f.getparams()
nchannels, sampwidth, framerate, nframes = params[:4]
print("Channels =", nchannels)
print("Sample width =", sampwidth)
print("Frame rate =", framerate)
print("Frames =", nframes)
str_data = f.readframes(nframes)   #Reads and returns at most n frames of audio, as a bytes object.

f.close()

#length = f.getnframes()
#for i in range(0,length):
#    waveData = f.readframes(1)
#    data = struct.unpack("<h", waveData)
#    print(int(data[0]))
    
wave_data = np.fromstring(str_data, dtype=np.short)  #A new 1-D array initialized from text data in a string
                                                     # str_data is string containing the data
                                                     #dtype= The data type of the array; default: float

print ("Audio data =", wave_data)       

wave_data.shape = -1, 2     #formats array in rows and columns
                            #-1. In this case, the value is taken from the length of the array and remaining dimensions.

wave_data = wave_data.T     #.T is self transpose the array i.e. rows to columns


time = np.arange(0, nframes) * (1.0 / framerate) #for creating time axis for plot, arrange for no. of frames, (1.0 / framerate) will create in seconds
                                                 #arange = Returns evenly spaced values within a given interval.
                
figure = plt.gcf() # get current figure
figure.set_size_inches(8*20, 6)

duration = nframes/float(framerate)
xticks = np.arange(0, duration, 2)
plt.subplot(211).set_xticks(xticks)
plt.plot(time, wave_data[0])
plt.title('Audio channel 1', loc='left')

plt.subplot(212).set_xticks(xticks)
plt.plot(time, wave_data[1], c="g")
plt.xlabel("time (seconds)")
plt.title('Audio channel 2', loc='left')
plt.savefig('Audio.png', dpi=100, bbox_inches='tight', pad_inches=0.1)
plt.show()
#plt.close(figure)

but i am getting the following error:

Channels = 2
Sample width = 4
Frame rate = 8000
Frames = 23493
Audio data = [ 0 0 0 ... 0 0 -6]

Error:
Traceback (most recent call last):
  File "C:\Users\a\AppData\Local\Programs\Python\Python35-32\trywav.py", line 45, in <module>
    plt.plot(time, wave_data[0])
  File "C:\Users\a\AppData\Local\Programs\Python\Python35-32\lib\site-packages\matplotlib\pyplot.py", line 2813, in plot
    is not None else {}), **kwargs)
  File "C:\Users\a\AppData\Local\Programs\Python\Python35-32\lib\site-packages\matplotlib\__init__.py", line 1810, in inner
    return func(ax, *args, **kwargs)
  File "C:\Users\a\AppData\Local\Programs\Python\Python35-32\lib\site-packages\matplotlib\axes\_axes.py", line 1611, in plot
    for line in self._get_lines(*args, **kwargs):
  File "C:\Users\a\AppData\Local\Programs\Python\Python35-32\lib\site-packages\matplotlib\axes\_base.py", line 393, in _grab_next_args
    yield from self._plot_args(this, kwargs)
  File "C:\Users\a\AppData\Local\Programs\Python\Python35-32\lib\site-packages\matplotlib\axes\_base.py", line 370, in _plot_args
    x, y = self._xy_from_xy(x, y)
  File "C:\Users\a\AppData\Local\Programs\Python\Python35-32\lib\site-packages\matplotlib\axes\_base.py", line 231, in _xy_from_xy
    "have shapes {} and {}".format(x.shape, y.shape))
ValueError: x and y must have same first dimension, but have shapes (23493,) and (46986,)

PLease guide

---

Hello Buran,

I shall take care henceforth

Than you