MicroPython Forum (Archive)

Thanks Peter. While TFilter/FIR filter works well as a low pass filter, when used as a high pass or band pass filter, one loses too much. If the problem didn't appear in the high pass I'd just couple the low pass and high pass filters. But given the losses it does not look too good. I'm looking to d...

Thanks Peter! This is wonderful stuff! The filters from TFilter are ripple filters and not Butterworth. I'm a newbie to DSP, but I figure a multi-tap FIR may make more sense than a Butterworth especially given your optimized code. I'm getting ~1200 taps for a band pass filter. It will likely mean lo...

Has anyone implemented Butterworth filters in Micropython? Given how commonly they are needed, I wonder if there are any open source implementations out there.