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pschatzmann / arduino-audiokit

Arduino ADF/Audiokit HAL (support for ESP32-A1S, AI-Thinker, LyraT for ES7148, ES7210, ES7243, ES8311, ES8347, ES8388, TAS5805M, AC101 audio chips)
GNU General Public License v3.0
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Improve Input Quality #101

Closed massa007 closed 1 year ago

massa007 commented 1 year ago

Hi everyone,

I have setup the AI-Thinker Audio Kit (ES8388) with audiokit framework. I get an output and can also record via On-Board mics. The recording quality is quite limited in my case with a high frequency noise in the background and some lower noise. It is ok but far away from perfect! I bought an external microphone which I can plug into the line in jack plug.

  1. Which Input do I have to set for using the audio jack line in? I do currently use cfg.input_device = AUDIO_HAL_ADC_INPUT_LINE2; and tried Line1, Line3 and ALL without success.
  2. Any other options on how to improve recording quality?
pschatzmann commented 1 year ago

If I remember right AUDIO_HAL_ADC_INPUT_LINE2 should be the microphones and AUDIO_HAL_ADC_INPUT_LINE1 is AUX in. Unfortunately in your version there is a hardware bug that prevents that you can deactivate the internal microphones

You can try to fine tune the input gain and output volume for your use case....

The ES8388 provides quite a lot of complex optimizations. So you would need to read the Technical Sheet yourself and update the corresponding registers.

massa007 commented 1 year ago

Thanks a lot for your quick answer! May I ask for any recommendation for a similar board without this bug/limitation and better recording quality?

pschatzmann commented 1 year ago

The LyraT and the old ai_thinker (AC101) work as designed!

I don't think that the quality will be better however. I am not sure if it is a problem with your board or just your expectations. Maybe it's an issue with your power supply?