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The volume configuration of tvp5158

Tery lee
Prodigy 150 points
Other Parts Discussed in Thread: TVP5158

Hi all，

I need to sample one channel analog audio signal input from tvp5158 now. I have connected the I2S ports of tvp5158 to McASP4 ports of DM8148. I choose DVRRDK_04.00.00.03 as my development environment. I can record audio now. But I find the volume of the audio which I recorded is too low to hear clearly. I have  set the gain as 0db by configuring the register of tvp5158. How to turn up it? I appreciate any help of anyone!

  • 0
    TI__Mastermind 43875 points

    What is the voltage level of your source?

    The TVP is configured to give a full range input level sensitivity of a standard consumer line level, i.e. peak to peak of 0dB = 1.414V

    The recommended resistor divider at the input of the TVP divides the input by 2 so that a standard signal is in range of the ADC input max of 0.8V.

    If you source signal level is non-standard for some reason then you can increase the value of the lower divider resistor.

    A better solution though is to control the volume level in software on the DM8148. Unfortunately I cannot comment on that and I would suggest posting a question regarding how to control the volume of McASP on the DM8148 forums.

    BR,

    Steve