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     DATA LINK: https://www.hatarilabs.com/ih-en/geospatial-triangular-interpolation-with-python-scipy-geopandas-and-rasterio-tutorial

 Producing a spectrogram using  .wav file is easy with python program codes.Where,I can express established more selective a stucture by other spectrogram modules considering chapter as manuel parameters of spectrogram solution presented of pylab!!! Informations about source .wav file; Program snapshots; Notes: You clearly evaluate based on specgram code that about process on a character assignment of NFFT parameter...For this aim, requiring solution of structure summaried as NFFT=2^nextpow2(L)...Thus,I acted on a suggestion; And,I prepared nextpow2.py as sub-program;   Subject solution established of sub-program as observed at main program based on [ln 3].But,this value is not producing conclusion as character q for NFFT value related of specgram code...In this point,I carried-out a manual control for numeric value established minimum NFFT value...As conclusion,observed minimum structure of 128 value!!!Also,I especially express reflected a strucuture as ~ 1024 of NFFT va...