Comments (1)
Sorry but screenshots are of no use to make a case. You'd need to send code.
However I see that you are using for example filtfilt in python which is an a-causal filter running in neg and positive time to achieve linear phase on an array while iirj is a causal filter. See also discussions about this on the sister iir1 c++ filter. This crops up at regular intervals and is the result of atrocious DSP teaching with MATLAB heritage and sadly also misleading comments all over the web. For a starter you you'd need to use lfilter in python which is the real causal filter. However, I'm sorry I cannot teach you digital signal processing here but you'll find my youTube videos here: https://www.youtube.com/dspcourse.
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Related Issues (20)
- Version number mismatch? HOT 4
- Some help converting code from Matlab HOT 3
- Debug message HOT 2
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- Real-time filtering vs array filtering HOT 2
- Question on Butterworth highPass, cutoff==Nyquist, coefficients are NaN? HOT 1
- Applying butterworth bandpass filter on a wav file HOT 1
- Input for butterworth filter on audio signal HOT 1
- Changing target Frequency while feeding in new Samples HOT 3
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- Unusual results when using Bessel filters of higher orders HOT 5
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