• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 29 subscribers
  • Views 614 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

PCM2900C: Analog Volume Control Required? Analog Volume Control Recommended?

Jay Shoemaker
Intellectual 650 points
Other Parts Discussed in Thread: PCM2900C, LM1972

Hello,

My company is building an audio mixer for pro-level audio mixing. We are interested in adding USB Audio support so that users can play songs from their computer via USB to the mixer. So we are thinking about integrating a PCM2900C. 

1) Do we need to install a volume slider for the PCM2900C? Or does the PCM2900C have an analog volume control built in?

2) If we skipped adding the volume slider for the PCM2900C, it would be digitally attenuated via the WINDOWS VOLUME MIXER, correct?

3) If we added a "digitally controlled analog volume control" (for example the LM1972) can we allow windows to control the LM1972 in place of the PCM2900C "Speaker" volume control (Control Panel>Sounds>...)

I hope this question is clear enough. Thank you so much for your assistance!

Jay

  • 0
    TI__Guru* 98965 points
    Hi Jay,

    PCM2900C does not have analog volume control. The volume control in PCM2900C is digital (Up, Down and Mute)
    Yes, volume can be controlled through windows volume mixer.
    PCM2900C volume is controlled through the USB connection by standard USB Audio Class driver. If you want to control LM1972 you need to build some interface to pass from the PC to the 3-wire control required on LM1972.

    Best regards,
    -Ivan Salazar
    Texas Instruments