Some issues about chinese android head unit

[coolpapabel]

Hello everyone, I need help, I bought a chinese android multimedia:




and I have two very annoying problems:

• When I start the car and the multimedia starts, the volume is ALWAYS turned up to 8, which is very loud and I have to turn it down every time before turning on the radio or player.

• Тhe second is that the multimedia has no audio signal for the player or anything else before you FIRST turn on the radio even for a few seconds. I mean that for the sound to come I first have to start the radio and then I can use the player, navigation, etc. with sound.

Please advise how I can solve these two issues.