Check out GNU Radio. In contrary to what the name suggests, it's not just for radio, but can be used for doing complex DSP operations. It includes a nice filter

Check out GNU Radio. In contrary to what the name suggests, it's not just for radio, but can be used for doing complex DSP operations. It includes a nice filter design tool, too. https://www.gnuradio.org/grcon/grcon18/presentations/The_Bright_Side_of_the_Dark_Side_of_DSP_Audio_Effects_using_GNU_Radio/2-Ashish_Chaudhari_audio_effects.pdf https://www.gnuradio.org/grcon/grcon18/presentations/The_Bri... https://w7fu.com/audio-oscillator-project/ https://w7fu.com/audio-oscillator-project/ The best option to install it on Windows is radioconda: https://github.com/ryanvolz/radioconda https://github.com/ryanvolz/radioconda