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TLV320AIC3204: TLV320AIC3204 :How can the compression curves of HP channel and LO channel output ambient stereo be consistent?

Part Number: TLV320AIC3204

Tool/software:

Hello,

I used LO and HP channels of 3204 for ambient stereo, set the same AGC and DRC parameters, and LO and HP hardware circuit parameters are the same, but the compression curves of LO and HP output ambient stereo are not consistent, what is the factor causing this? How do I get them to output the same curve without changing the register Settings?

HP:

LO:

  • Hi Luo,

    What is your test procedure for obtaining these curves?

    Best regards,
    Jeff McPherson

  • Hi Jeff,

    The AGC and DRC integrator configurations are the same for the headset output and the line output.

    ADC-DAC loopback .txt
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    ###############################################
    # Software Reset
    ###############################################
    #
    # Select Page 0
    w 30 00 00
    #
    # Initialize the device through software reset
    w 30 01 01
    #
    ###############################################
    ###############################################
    # Clock Settings
    # ---------------------------------------------
    #The input clock signal : MCLK = 11.2896 MHz,BLCK = 1.4 MHz, WCLK = 44.1 kHz
    ###############################################
    #
    # Select Page 0
    w 30 00 00
    #
    # NADC = 1, MADC = 2
    w 30 12 81 82
    #
    ###############################################
    ###############################################
    #AGC
    ###############################################
    w 30 00 00
    w 30 57 7E
    w 30 56 F0
    w 30 58 40
    w 30 59 08
    w 30 5A 32
    w 30 5B 18
    XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

  • Hi Luo,

    Thank you for the script. This is helpful. But I also need details on the hardware for the testing. What is the input signal to the codec? Are you measuring the voltage on the output pins? Are you using a microphone, etc?

    Thanks,
    Jeff McPherson