###### tags: `jptw` `thesis` `technology` `python`
# Packages in Python
## Spectrogram
> [1] [Python mlab.specgram方法代碼示例](https://vimsky.com/zh-tw/examples/detail/python-method-matplotlib.mlab.specgram.html)
> [2] [Github nmkridler/sirbarksalot](https://github.com/nmkridler/sirbarksalot/blob/master/sirbarksalot/listener/specgram.py)
> [3] [matplotlib.mlab](https://matplotlib.org/3.1.1/api/mlab_api.html)
> [4] [使matplotlib.pyplot彩條橫跨波形和specgram的兩行](http://hk.uwenku.com/question/p-ywmtjxzt-m.html)
> [5] [How to convert a .wav file to a spectrogram in python3](https://stackoverflow.com/questions/44787437/how-to-convert-a-wav-file-to-a-spectrogram-in-python3)

## Librosa
> [1] [Python librosa.load方法代碼示例](https://vimsky.com/zh-tw/examples/detail/python-method-librosa.load.html)

## Matplotlib
> [1] [Common xlabel/ylabel for matplotlib subplots](https://stackoverflow.com/questions/16150819/common-xlabel-ylabel-for-matplotlib-subplots)
> [2] [matplotlib: how to draw a rectangle on image](https://stackoverflow.com/questions/37435369/matplotlib-how-to-draw-a-rectangle-on-image)

## Scipy
> [1] [scipy.signal.find_peaks](https://docs.scipy.org/doc/scipy/reference/generated/scipy.signal.find_peaks.html)
> [2] [Why is Scipy implementation of Hilbert() function different from Matlab implementation of the function?](https://dsp.stackexchange.com/questions/46291/why-is-scipy-implementation-of-hilbert-function-different-from-matlab-implemen)
> [3] [Hilbert transforms are extremely slow on odd-length signals](https://github.com/scipy/scipy/issues/6324)
> [4] [scipy.fftpack.next_fast_len](http://scipy.github.io/devdocs/generated/scipy.fftpack.next_fast_len.html)

## Implementation
> [1] [如何用Python創建音樂可視化器](https://kknews.cc/zh-tw/code/pb8kvej.html)