PCM5122: About monaural analog outputs

Hi Ryu,

The mono mixer works in digital domain and mixes the digital  data.

The Mono Mixer computes a weighted sum of 2 input channels and produces an output, it can apply gain settings for L and R channels and then mix the together.

Mono_Mixer_1_MixGain1 C154 (Pg 49, Reg 24, 25, 26, 27)
Mono_Mixer_1_MixGain2 C155 (Pg 49, Reg 28, 29, 30, 31)

Page 49  is not in datasheet list of register and you need the GUI to change it. For more info please refer to APP note  "PCM512x ROM Code" 

https://www.ti.com/lit/an/slaa541/slaa541.pdf?ts=1729878489817&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FPCM5122

If you want to mix the output of DAC ,  then this has to be done after the DAC operation, for that I would use DACs that have analog input so the output of one chaneel can be  send  back  to one of  these  Analog input. Our new upgrade to PCM512x and new line DACs (TAD5xxx) have these capabilities. You can read more about this idea in the following app note in section 2.3 Mixing and Bypass  

https://www.ti.com/lit/an/slaaee0a/slaaee0a.pdf?ts=1729878773976&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FTAD5212

Kind Regards,

Arash

Thanks Ryu. 

Regards,