录音噪音偏大音量偏小的问题

[qinli198]

模块esp32-wrover-e + es8388S 开发voip对讲，播放声音很好声音清晰没有噪音，
没有说话的时候背景噪音比较大。
但是话筒人说话时距离话筒近一点，声音大一点说话没问题还是比较清晰的，距离远一点声音一下就很小了，不是按距离衰减的。
请问这个芯片录音部分有哪些参数 可以音量增大。灵敏度高一点。

esp_err_t es8388_init(audio_hal_codec_config_t *cfg)
{
int res = 0;
#ifdef CONFIG_ESP_LYRAT_V4_3_BOARD
// headphone_detect_init(get_headphone_detect_gpio());
#endif

res = i2c_init(); // ESP32 in master mode

res |= es_write_reg(ES8388_ADDR, ES8388_DACCONTROL3, 0x04); // 0x04 mute/0x00 unmute&ramp;DAC unmute and disabled digital volume control soft ramp
/* Chip Control and Power Management */
// res |= es_write_reg(ES8388_ADDR, ES8388_CONTROL2, 0x50);
res |= es_write_reg(ES8388_ADDR, ES8388_CONTROL2, 0x00);
res |= es_write_reg(ES8388_ADDR, ES8388_CHIPPOWER, 0x00); //normal all and power up all

// Disable the internal DLL to improve 8K sample rate
res |= es_write_reg(ES8388_ADDR, 0x35, 0xA0);
res |= es_write_reg(ES8388_ADDR, 0x37, 0xD0);
res |= es_write_reg(ES8388_ADDR, 0x39, 0xD0);

res |= es_write_reg(ES8388_ADDR, ES8388_MASTERMODE, cfg->i2s_iface.mode); //CODEC IN I2S SLAVE MODE

/* dac */
res |= es_write_reg(ES8388_ADDR, ES8388_DACPOWER, 0xC0); //disable DAC and disable Lout/Rout/1/2
#ifdef ES8388S
res |= es_write_reg(ES8388_ADDR, ES8388_CONTROL1, 0x06); //1001 0010 Enfr=0,Play&Record Mode,(0x17-both of mic&paly)
#else
res |= es_write_reg(ES8388_ADDR, ES8388_CONTROL1, 0x12); //Enfr=0,Play&Record Mode,(0x17-both of mic&paly)
#endif
// res |= es_write_reg(ES8388_ADDR, ES8388_CONTROL2, 0); //LPVrefBuf=0,Pdn_ana=0
res |= es_write_reg(ES8388_ADDR, ES8388_DACCONTROL1, 0x18);//1a 0x18:16bit iis , 0x00:24
#ifdef ES8388S
res |= es_write_reg(ES8388_ADDR, ES8388_DACCONTROL2, 0x44); //DACFsMode,SINGLE SPEED; DACFsRatio,512
#else
res |= es_write_reg(ES8388_ADDR, ES8388_DACCONTROL2, 0x02); //DACFsMode,SINGLE SPEED; DACFsRatio,512
#endif
res |= es_write_reg(ES8388_ADDR, ES8388_DACCONTROL16, 0x00); // 0x00 audio on LIN1&RIN1, 0x09 LIN2&RIN2
res |= es_write_reg(ES8388_ADDR, ES8388_DACCONTROL17, 0x90); // only left DAC to left mixer enable 0db
res |= es_write_reg(ES8388_ADDR, ES8388_DACCONTROL20, 0x90); // only right DAC to right mixer enable 0db
res |= es_write_reg(ES8388_ADDR, ES8388_DACCONTROL21, 0x80); //set internal ADC and DAC use the same LRCK clock, ADC LRCK as internal LRCK
res |= es_write_reg(ES8388_ADDR, ES8388_DACCONTROL23, 0x00); //vroi=0
res |= es8388_set_adc_dac_volume(ES_MODULE_DAC, 0, 0); // 0db
int tmp = 0;
if (AUDIO_HAL_DAC_OUTPUT_LINE2 == cfg->dac_output) {
tmp = DAC_OUTPUT_LOUT1 | DAC_OUTPUT_ROUT1;
} else if (AUDIO_HAL_DAC_OUTPUT_LINE1 == cfg->dac_output) {
tmp = DAC_OUTPUT_LOUT2 | DAC_OUTPUT_ROUT2;
} else {
tmp = DAC_OUTPUT_LOUT1 | DAC_OUTPUT_LOUT2 | DAC_OUTPUT_ROUT1 | DAC_OUTPUT_ROUT2;
}
res |= es_write_reg(ES8388_ADDR, ES8388_DACPOWER, tmp); //0x3c Enable DAC and Enable Lout/Rout/1/2
/* adc */
res |= es_write_reg(ES8388_ADDR, ES8388_ADCPOWER, 0xFF);
tmp = 0;
if (AUDIO_HAL_ADC_INPUT_LINE1 == cfg->adc_input) {
tmp = ADC_INPUT_LINPUT1_RINPUT1;
} else if (AUDIO_HAL_ADC_INPUT_LINE2 == cfg->adc_input) {
tmp = ADC_INPUT_LINPUT2_RINPUT2;
} else {
tmp = ADC_INPUT_DIFFERENCE;
}

//ALC for Microphone
#ifdef ES8388S
res |= es_write_reg(ES8388_ADDR, ES8388_ADCCONTROL1, 0x80); // MIC Left and Right channel PGA gain
res |= es_write_reg(ES8388_ADDR, ES8388_ADCCONTROL2, 0xc1); //0x00 LINSEL & RINSEL, LIN1/RIN1 as ADC Input; DSSEL,use one DS Reg11; DSR, LINPUT1-RINPUT1
res |= es_write_reg(ES8388_ADDR, ES8388_ADCCONTROL3, 0x02); //I2S
res |= es_write_reg(ES8388_ADDR, ES8388_ADCCONTROL4, 0x0d); // Left/Right data, Left/Right justified mode, Bits length, I2S format

res |= es_write_reg(ES8388_ADDR, ES8388_ADCCONTROL5, 0x44); //ADCFsMode,singel SPEED,RATIO=512
res |= es_write_reg(ES8388_ADDR, ES8388_ADCCONTROL6, 0x20); //0010 1100 enable high pass rate , max gain 11, min gain 00
res |= es_write_reg(ES8388_ADDR, ES8388_ADCCONTROL10, 0xfC); //1111 1000 alc on max gain PGA 111 min gain PGA 100 12DB
//res |= es_write_reg(ES8388_ADDR, ES8388_ADCCONTROL11, 0xB5); //1011 0101
//res |= es_write_reg(ES8388_ADDR, ES8388_ADCCONTROL11, 0x51); //0101 0001 -50dbfs pga gain NOISE GATE enable
res |= es8388_set_adc_dac_volume(ES_MODULE_ADC, 0, 0); // 0db
res |= es_write_reg(ES8388_ADDR, ES8388_ADCPOWER, 0); //Power on ADC, Enable ALL //LIN&RIN, Power off MICBIAS, set int1lp to low power mode
#else
res |= es_write_reg(ES8388_ADDR, ES8388_ADCCONTROL1, 0x88); // MIC Left and Right channel PGA gain
res |= es_write_reg(ES8388_ADDR, ES8388_ADCCONTROL2, tmp); //0x00 LINSEL & RINSEL, LIN1/RIN1 as ADC Input; DSSEL,use one DS Reg11; DSR, LINPUT1-RINPUT1
res |= es_write_reg(ES8388_ADDR, ES8388_ADCCONTROL3, 0x02); //I2S
res |= es_write_reg(ES8388_ADDR, ES8388_ADCCONTROL4, 0x0d); // Left/Right data, Left/Right justified mode, Bits length, I2S format
res |= es_write_reg(ES8388_ADDR, ES8388_ADCCONTROL5, 0x02); //ADCFsMode,singel SPEED,RATIO=128
res |= es8388_set_adc_dac_volume(ES_MODULE_ADC, 0, 0); // 0db
res |= es_write_reg(ES8388_ADDR, ES8388_ADCPOWER, 0x09); //Power on ADC, Enable ALL //LIN&RIN, Power off MICBIAS, set int1lp to low power mode
#endif
/* enable es8388 PA */
// es8388_pa_power(true); //自己主板需要屏蔽的
ESP_LOGI(ES_TAG, "init,out:%02x, in:%02x", cfg->dac_output, cfg->adc_input);
return res;
}

[ESP_HengYC]

请问这个芯片录音部分有哪些参数 可以音量增大。灵敏度高一点。

这个一般是通过调节 es8388 的寄存器 mic gain 增益来放大录音的, 但是也不是越大越好,因为会饱和影响 AEC 效果. 需要结合具体的环境调试参数.

[techz2022]

你好 qinli198

我如何与您联系以详细讨论 VOIP 对讲机？