Awesome, thanks! Where do I find the DDPs for RMS drift, wow, and flutter?
They're in the dropdown menu.
Awesome, thanks! Where do I find the DDPs for RMS drift, wow, and flutter?
Thanks , but this is all Greek to me. Installed Anaconda and Python, but then I am lostA Python script reading a 4 sec .wav file. The Anaconda Python install runs it turnkey, some Python distributions require the advanced math libs to be hand installed. The script is posted a few posts above.
Enter the National Association of Broadcasters flutter meter calibration files I have uploaded here:
https://drive.google.com/drive/folders/1Gc6fW5l_sdhvBK6bhiaHzcHx_VW8Xa_7?usp=sharing
3150HzModulatedBy4HzAt0.00997Percent0.315Hz.wav
The above one is generated using a carrier frequency 3150 Hz, a modulating frequency 4 Hz, and a max. frequency deviation 0.315 Hz. Its unweighted and weighted peak wow & flutter values are thus: 0.315 / 3150 × sin(0.95×90°) = 0.00997%. Its unweighted and weighted RMS wow & flutter values are thus: 0.315 / 3150 × 0.707 = 0.00707%. It was generated using the signal generator of Multi-Instrument as follows. Calibration files with other wow and flutter values can be generated in a similar way.
Yes, a good TT does not deviate much so it's usually a nice circle. You're welcome to it, JPJ changed the cosmetics at little. You would have to change a few things for large deviations if the distortion gets too great. I also added a text tag for mean speed, don't know if that helps here because the mean is computed over one LP rev. Not sure what OS you use, a free Python distribution like Anaconda has all the libraries you need pre-installed.
Just when I managed to fix the frequency response script I tried the polar plot, but got this error (MacOS, IDLE). Have no clue what the error is.
============ RESTART: /Users/Thomas/Documents/polar plots/Polar plot script.py ============
Tacet.wav
Traceback (most recent call last):
File "/Users/Thomas/Documents/polar plots/Polar plot script.py", line 34, in <module>
y = read(HOME + _FILE)
File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/scipy/io/wavfile.py", line 647, in read
fid = open(filename, 'rb')
IsADirectoryError: [Errno 21] Is a directory: '/Users/Thomas/Documents/polar plots/'
#edit here to add a HOME directory, etc.
HOME = '/Users/jjones/Documents/polar/'
_FILE = 'FM_WF_SONY.wav'
print(HOME + _FILE)
/Users/jjones/Documents/polar/FM_WF_SONY.wav
Thanks,Not sure what you've entered but it's trying to open a directory as if it were a file.
This one is setup such that it requires HOME and _FILE:
Code:#edit here to add a HOME directory, etc. HOME = '/Users/jjones/Documents/polar/' _FILE = 'FM_WF_SONY.wav'
The IDLE shell retains the environment from the run, so you can interact with it to see what went wrong. In this case we can print the variable to screen and see if it makes sense. Using the config above:
Code:print(HOME + _FILE) /Users/jjones/Documents/polar/FM_WF_SONY.wav
Thanks, I guess there is new version somewhere, but not easy to spot which post it is.You’ve a really old version. There is a method that is deprecated that I need to fix - it throws a warning about that.
I think the overlap is because I shrink the window and save.Weird that the text is overlapping I’ll need to check that. If you do 1k you can change scale to 1Hz/div so the magnitude is the same.