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PCM2706C: Volume Control Problem

bongjin jeong
Prodigy 140 points
Part Number: PCM2706C

hello

I made an usb DAC with PCM2706C and CS4334, 

here schematic is , 

Problem is DAC is run Properly, but i can't control it's volume by windows's volume mixer

what should i do ? 

  • 0
    TI__Guru** 104555 points
    Hi Bongjin,

    Are you using the analog output of the DAC?
    Are you trying to control the volume of the I2S signal? The volume control changes the volume of the analog output, the digital output like I2S and S/PDIF have a constant level.
    Couldn't you interface the analog output of PCM2706C to your next stage bypassing C4334? This way you could control the volume of the analog output signal.

    Best regards,
    -Ivan Salazar
    Texas Instruments
  • 0 in reply to Ivan Salazar
    Prodigy 140 points
    i've got it

    thank you very much !