portapack-mayhem/firmware/common/dsp_sos_config.hpp

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/*
* Copyright (C) 2020 Belousov Oleg
*
* This file is part of PortaPack.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifndef __DSP_SOS_CONFIG_H__
#define __DSP_SOS_CONFIG_H__
#include "dsp_iir.hpp"
// scipy.signal.iirfilter(ftype="ellip", N = 10, rp = 0.5, rs = 60.0, Wn = 0.5, btype = 'lowpass', output="sos")
constexpr iir_biquad_df2_config_t half_band_lpf_config[5] = {
{0.02339042f, 0.0411599f, 0.02339042f, 1.0f, -0.95317621f, 0.33446485f},
{1.0f, 0.82196114f, 1.0f, 1.0f, -0.50327735f, 0.63611027f},
{1.0f, 0.32515305f, 1.0f, 1.0f, -0.18144446f, 0.85269598f},
{1.0f, 0.14394122f, 1.0f, 1.0f, -0.04368236f, 0.94798064f},
{1.0f, 0.08720754, 1.0f, 1.0f, 0.00220944f, 0.98743139f}};
#endif /*__DSP_SOS_CONFIG_H__*/