cnn2d() in models.py is not working

[akpeker]

pyAudioClassification/pyaudioclassification/models.py

Line 53 in 54c6c0a

def cnn2d(num_classes):

cnn2d function in models.py have layer size issues; gives error by Keras:
ValueError: Input 0 is incompatible with layer conv2d_31: expected ndim=4, found ndim=3

Also, there are minor bugs:

• model = Sequential() is missing at the beginning.
• num_classes is used as parameter, but nb_classes is used in the function.