• State Resolved
  • Locked Locked
  • Replies 4 replies
  • Answers 1 answer
  • Subscribers 29 subscribers
  • Views 1111 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.

PCM5122: DAC output from fixed processing flow

na na78
Guru 16770 points
Part Number: PCM5122
Other Parts Discussed in Thread: PCM5242, PCM5142,

Hi

We want to use biquad filter, volume and monomix of processing block.

Now I refer figure 55.

We can see 1ch I2S out as the output of mono mix.

Is it possible to make mono mix out route to DAC out?

(Or 2ch interpolation filter is just DAC out?)

BestRegards

  • 0
    TI__Guru 53633 points
    Hello,

    The 2ch interpolation filter is the stereo output of the DAC. The ROM on PCM5122 cannot be modified to make the mono mixer output the DAC output. In this case I think you should consider the PCM5142 for its customer process flow capability or PCM5242 for its hybrid flow (specifically hybrid flow 4) capability.
    www.ti.com/.../slau577a.pdf

    You could also see if the I2S source for the PCM5122 is capable of mono mixing, so that the source is already mono.

    Thanks!
    Paul
  • 0 in reply to Paul_Frost
    Guru 16770 points

    Hi Paul

    Thank you for your reply.

    I checked PCM5142 and got the following image. I could not make mono out.

    Did I get something wrong?  Could you please show me a way to make DAC output of mono-mix out with PCM5142?

    BestRegards

  • 0 in reply to na na78
    TI__Guru 53633 points

    Hi,

    I created a flow for the PCM5142 which should take care of this.  Take a look at the attached file.

    Thanks!

    Paul

    PCM5142_Mono_Out.zip

  • 0 in reply to Paul_Frost
    Guru 16770 points

    Hi Paul

    Thank you for your info.
    It's  helful!

    BestRegards