Dear forum members,
I am using a TLV320AIC3206. While playback works flawlessly, the microphone volume is currently way too quiet to be usable. The quality seems fine. I was wondering whether my setup might be wrong or if there is any other issue.
What is the correct procedure to identify the correct PGA/ADC values? I am not using the AGC just yet, since I wanted to get a decent sound without the AGC first and then set the desired value later. I am also using amixer instead of writing directly to the bus. The following controls are exported:
ADC Level Volume ADCFGA Left Mute Switch ADCFGA Right Mute Switch AGC Attack Time AGC Decay Time AGC Gain Hysteresis AGC Hysteresis AGC Left Switch AGC Max PGA AGC Noise Debounce AGC Noise Threshold AGC Right Switch AGC Signal Debounce AGC Target Level Auto-mute Switch CM_L to Left Mixer Negative Resistor CM_R to Right Mixer Negative Resistor HP DAC Playback Switch HP Driver Gain Volume HPL Output Mixer IN1_L Switch HPL Output Mixer L_DAC Switch HPR Output Mixer IN1_R Switch HPR Output Mixer R_DAC Switch IN1_L to Left Mixer Positive Resistor IN1_L to Right Mixer Negative Resistor IN1_R to Left Mixer Positive Resistor IN1_R to Right Mixer Positive Resistor IN2_L to Left Mixer Positive Resistor IN2_L to Right Mixer Positive Resistor IN2_R to Left Mixer Negative Resistor IN2_R to Right Mixer Positive Resistor IN3_L to Left Mixer Positive Resistor IN3_L to Right Mixer Negative Resistor IN3_R to Left Mixer Negative Resistor IN3_R to Right Mixer Positive Resistor LO DAC Playback Switch LO Driver Gain Volume LOL Output Mixer L_DAC Switch LOR Output Mixer R_DAC Switch Mic PGA Switch PCM Playback Volume PGA Level Volume
I assume that the following controls are interesting in the first step:
- ADC Level Volume
- PGA Level Volume
- Mic PGA Switch
- IN1_R to Right Mixer Positive Resistor
- IN1_R to Left Mixer Positive Resistor
- CM_L to Left Mixer Negative Resistor
- CM_R to Right Mixer Negative Resistor
Can someone confirm and give me hints regarding the best procedure to set this up correctly?
Thank you for your help!