Status

[pschatzmann]

Since you did not open the discussion tab, I create an issue instead to document the current status:

All my audio test cases (that you can find in the examples folder) were passing except the audio input via the earphones which has a lot of noise

• output: passed
• output via amplifier: passed
• SD: passed
• SDMMC: passed
• wifi: passed
• input: a lot of noise (via the earphones of my phone)

On my board I do not have the SA818s soldered so I can't really do any tests with this. But just for the documentation could you describe how the output and input is connected to the ES8388: I would assume that they are on AUDIO_HAL_ADC_INPUT_LINE2 and AUDIO_HAL_DAC_OUTPUT_LINE2 ?

[immortal-sniper1]

1 i dont know how do open discussions 2 regarding noise i am not sure and we need to talk with Andreas , maybe another cap type heavier via stitching or a pre amplifier for larger input impedance . 3 Yes they are supposed to be connected there. The modules can receive analogue audio and output it too and there are a few pins that control this functionality
As a note on the modules even if we had them it would be only a receiver or a sender so in a way the RF tests need to be done by Andreas since he has most boards and can also ask x y z for a transmission on those bands. Theoretically we can also receive audio but it is going to be more like catch what u can.

[pschatzmann]

Activating discussions is easy: Just click on the settings tab and activate the Discussions flag under the Features title

[immortal-sniper1]

try now , should be open. BTW was the speed for the SPI and the codec appropriate ? did u use SPI 1bit or 4bit for the SD card ?

[pschatzmann]

If I remember right, SDMMC was working only with 4 bits but not with 1 bit. At least that't the version that you find in the example