do_shelving_filter(chorus_effect_buffer, count, chorus_param.high_coef, chorus_param.high_val);
do_filter_iir1_lowpass_stereo(chorus_effect_buffer, count, &(chorus_param.lpf));
void do_ch_chorus(int32 *buf, int32 count){	if ((opt_reverb_control == 3 || opt_reverb_control == 4			|| opt_reverb_control < 0 && ! (opt_reverb_control & 0x100)			|| opt_effect_quality >= 1) && chorus_param.chorus_pre_lpf)		do_shelving_filter(chorus_effect_buffer, count, chorus_param.high_coef,				chorus_param.high_val);	do_stereo_chorus(buf, count);}