Sorry first of all not sure if its in the correct catogery.

I've got a audi a3 and when listening to cds/radio sometimes the sound system can sound a bit timied. So I've gone into the menu/settings to turn it up which gives it more of a bass. However 5 secs later it will jump out of it and then go back to the normal sound.

Ive looked in the manual and looked on the internet but cant seem to find out how to keep it to the volume ive set it as.

Hope that this makes scence. Thanks in advance for your help