Audio classification

Introduction

Use fastai to classify audio data.By converting audio files into images,and then using the techniques of image classification to classify audio images.there are three audio-to-image conversion methods in the code.

使用fastai 来对音频数据分类。通过把音频文件转换成图像，然后利用图像分类的技巧对音频图像进行分类。代码中共利用了三种音频转图像的方式。

Three feature conversion methods

The result of sending the same audio file into three different feature conversion codes

同一个音频文件送入到三种不同的特征转换代码中得到的结果

chroma

melspec

mfccs

Among the three features, melsec is the best, chroma is average, and mfccs is not good

三种特征中，melspec效果最好，chroma一般，mfccs效果不好

How to use

extractor_3feature.ipynb    -->    Feature extraction code for converting audio files into 3 different picture features
                                   用来将音频文件转换成3种不同的图片特征的特征提取的代码
sound_classification.ipynb    -->    The image features obtained above are sent to the image classification CNN network to obtain the classification results
                                     将上面得到的图片特征送入到图像分类CNN网络得到分类结果