Audio issue with SJCAM 5000?

[pelinking]

I bought a SJCAM 5000 from a Chinese vendor, and I already own a GoPro, I am generally happy with the SJCAM, but the audio quality makes me suffer, any idea to improve it , like firmware update?

 

[TonyCams]

Firmware generally does not resolve audio issues. If you feel your audio is really low, please contact support.

Thanks