Using NAU8814 for Audio to PCM Conversion in Voice Calls

IoT Modules LTE Standard Module
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1

Hi,

I’m working with the NAU881* audio converter in a project using the Quectel EG91-AUX module. I need to convert audio signals to PCM and use them in a voice call.

Could anyone guide me on the proper procedure using AT commands to configure the NAU8814 for PCM conversion in a voice call?

Additionally, I have a couple of questions:

  • By default, does the NAU8814 use the microphone input to convert audio to PCM?
  • If I want to use the AUX input instead, is there a way to configure or enable this option?

Any help or insights would be greatly appreciated!

Thanks in advance!

2

Currently, module just support codec NAU8810 and NAU8814. Which one you are using? You can use AT+QDAI to set correct codec.

4

For voice calls using the NAU8814 with Quectel EG91-AUX, configure audio input (MIC or AUX) via AT commands for PCM conversion. Learn more about temperature conversion with this handy tool: 36.5 celsius to fahrenheit.

5

Hello, I am using NAU8814. When I use the AT+QIIC command, it consistently returns ERROR. However, based on other references, even if the read operation fails, it should return 0x00. I would like to know whether this issue stems from a problem with my hardware circuitry or if my module does not support the NAU8814. For reference, my module is the EC200 series.