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Original question:

TLV320DAC3203 digital microphone (PDM) to Headphone output

TLV320DAC3203: DSP to Headphone output

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Prodigy 10 points
Part Number: TLV320DAC3203

Tool/software:

Hello everyone,

I'm trying to implement the following application.
DSP --> Audio Interface --> DAC --> Headphone

However, I encountered a strange problem.
When I powered on for the first time and initialized according to the Reference Guide Section 4.4, there was no sound output from the headphones.
In the continuous DAC power supply, just the DSP enters the standby state, which is equivalent to the I2S no output of the DSP.
Then, active the DSP again, and the same initialization actions for the DAC will be executed again.
Then the headphones will have sound output.

Now I don't know why this is happening.
Please helps. Thanks.

  • 0
    TI__Expert 4920 points

    Hi,

    Is this an issue with the DAC not turning on the headphones? Or is your DSP not initializing correctly? Is the audio generated on a computer or the DSP? Please make sure that the DAC is receiving I2S in order to evaluate the headphone output. How are you measuring that there is no output from the headphone? Is there a situation where the DAC is receiving I2S signals but no analog output is produced? 

    Also, please paste your I2C commands here, just to make sure we are on the same page.

    Best,
    Mir