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///初始化数字音量 struct audio_stream_entry *dvol_entry; if (effect->parm.effect_config & BIT(MIC_EFFECT_CONFIG_DVOL)) { effect_dvol_default_parm.ch_total = ch_num;

#if defined(SYS_DIGVOL_GROUP_EN)&&SYS_DIGVOL_GROUP_EN
dvol_entry = sys_digvol_group_ch_open(“mic_mic”, -1, &effect_dvol_default_parm);
effect->d_vol = audio_dig_vol_group_hdl_get(sys_digvol_group, “mic_mic”);
#else
effect->d_vol = audio_dig_vol_open((audio_dig_vol_param *)&effect_dvol_default_parm);
dvol_entry = audio_dig_vol_entry_get(effect->d_vol);
#endif /SYS_DIGVOL_GROUP_EN/
}