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python Programming Glossary: hzmatplotlib tick axis notation with superscript http://stackoverflow.com/questions/16529038/matplotlib-tick-axis-notation-with-superscript lines with vertical annotation separate kilo and mega Hz. import numpy as np import matplotlib.pyplot as plt band np.linspace.. plt.vlines 10 3 min y max y colors 'black' label 'kilo Hz' plt.vlines 10 6 min y max y colors 'black' label 'mega Hz'.. Hz' plt.vlines 10 6 min y max y colors 'black' label 'mega Hz' plt.legend plt.show I tried use ticker but can't figure it..
http://stackoverflow.com/questions/1797631/recognising-tone-of-the-audio your purposes. Capturing 16 bit samples at a rate of 48000 Hz is pretty typical and probably the best a normal sound card..
How get sound input from microphone in python, and process it on the fly? http://stackoverflow.com/questions/1936828/how-get-sound-input-from-microphone-in-python-and-process-it-on-the-fly alsaaudio.PCM_NONBLOCK # Set attributes Mono 8000 Hz 16 bit little endian samples inp.setchannels 1 inp.setrate 8000..
http://stackoverflow.com/questions/2648151/python-frequency-detection output it thefreq which x1 RATE chunk print The freq is f Hz. thefreq else thefreq which RATE chunk print The freq is f Hz... thefreq else thefreq which RATE chunk print The freq is f Hz. thefreq # read some more data data wf.readframes chunk if data..
Analyze audio using Fast Fourier Transform http://stackoverflow.com/questions/604453/analyze-audio-using-fast-fourier-transform reading 1024 bytes of a 16 bit dual channel 44 100 Hz sample rate audio stream and averaging the amplitude of the.. in your FFT is 256 your frequency spacing is 44100 256 172 Hz approximately The first coefficient in your array will be the.. your coefficients will count up from 0 in multiples of 172 Hz until you get to 128. In an FFT you only can measure frequencies..
http://stackoverflow.com/questions/6567724/matplotlib-so-log-axis-only-has-minor-tick-mark-labels-at-specified-points-also 0.12 0.15 .8 .8 ax.set_ylabel 'Log Frequency Hz ' ax.set_xlabel 'Log Frequency Hz ' ax.set_xscale 'log' ax.set_yscale.. 'Log Frequency Hz ' ax.set_xlabel 'Log Frequency Hz ' ax.set_xscale 'log' ax.set_yscale 'log' ax.xaxis.set_minor_formatter.. 0.12 0.15 .8 .8 ax.set_ylabel 'Log Frequency Hz ' ax.set_xlabel 'Log Frequency Hz ' ax.set_xscale 'log' ax.set_yscale..
http://stackoverflow.com/questions/7782721/java-raw-audio-output decimalFormat.format freq decimalFormat.format freq 2f Hz else frequency.setText decimalFormat.format freq Hz Generate.. 2f Hz else frequency.setText decimalFormat.format freq Hz Generate the tone and inform the user of settings. public void..
Scipy/Numpy FFT Frequency Analysis http://stackoverflow.com/questions/9456037/scipy-numpy-fft-frequency-analysis 120 seconds 33.34 samples sec. The signal has a 2.0 Hz signal a 8.0 Hz signal and some random noise. I take the FFT.. 33.34 samples sec. The signal has a 2.0 Hz signal a 8.0 Hz signal and some random noise. I take the FFT grab the frequencies.. 33.34 the sampling frequency then I get peaks at about 8 Hz and 15 Hz which seems wrong also the frequencies should be a..
Python: How to get number of mili seconds per jiffy http://stackoverflow.com/questions/4189123/python-how-to-get-number-of-mili-seconds-per-jiffy get number of mili seconds per jiffy I'd like to know the HZ of the system i.e. how many mili seconds is one jiffy from Python.. python linux share improve this question There is USER_HZ import os os.sysconf_names 'SC_CLK_TCK' 2 os.sysconf 2 100 which.. in proc . From the time 7 manual page The Software Clock HZ and Jiffies The accuracy of various system calls that set timeouts..
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