No Sound from External CODEC

[Takumi_Ogata]

Here’s an explanation about the CODEC_2_VCOM

Advice needed on adding external codec

I’m really sorry for the delay in response. VCOM is generated by the codec as a reference voltage. It’s VCC / 2, so in this case 2.5V. This post explains it well: voltage reference - Why is the Vref of the DAC used in the op-amp amplifier stage? - Electrical Engineering Stack Exchange. I’ve also attached a reference circuit from the PCM3060 datasheet that uses it. [vcom]