Frequency Filter for wav file plotting in python

[manukanu]

I'm currently learning to plot in python. Here is a working frequency plotter for a wav file. Now i want to make a filter, which cuts out the frequencies below 300Hz and above 3400Hz, so kinda like a bandpass? Can anyone tell me the easiest way of doing that? I read something about a built in high and lowpassfilter like. Thanks for every answer

"wav_filename.low_pass_filter(3400)", but thats not working.

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%matplotlib inline   from scipy.io import wavfile from scipy.fftpack import fft, fftfreq import matplotlib.pyplot as plt from pydub import AudioSegment   wav_filename = "speech_clean (1).wav"   samplerate, data = wavfile.read(wav_filename)   total_samples = len(data)   limit = int((total_samples /2)-1)   fft_abs = abs(fft(data))   freqs = fftfreq(total_samples,1/samplerate)   fftfreq?   # plot the frequencies plt.plot(freqs[:limit], fft_abs[:limit]) plt.title("Frequency spectrum of %s" % wav_filename) plt.xlabel('frequency in Hz') plt.ylabel('amplitude') plt.show()