Audio is not working properly

Sladoeg

I have the same issue with audio on T-Firefly RK3288 board and I have tried to flash different images, but for me it does not solve the problem. Same audio noise in HD youtube videos.

In WebRTC application I cannot get any sound from the analog output, but sometimes I can get the sound with noise exactly according the samples above.
https://janus.conf.meetecho.com/videoroomtest.html.

According my testing experience, there is the issue with Rockchip soundcard as Alsa drivers cannot fully support it.

For example, at the alsamixer control panel the Output2 level works incorrect, using the value of more than 3 points fully mutes the noisy sound from analog output jack.

Does anybody know how to fix the sound issue in RK3288 Firefly linux distributions?
The best way is to create new updated image of firmware by T-Firefly support team.

Thank you in advance.