TDA2616, PGA2311 soundbar noise problem

[child1]

Hello everyone

Here's my little issue. I'm building an active soundbar for my television. I have build the amplifier/controller/subfilter PCB and assembled it but I'm experiencing some problems listed below.

- Loud audible hissing from the speakers. (not 50/60Hz noise, more like a snake )
- The pin changes from the TINY IR (remote receiver) do not trigger the interrupts in the attiny2313 for volume up/down/mute on the PGA2311

Have been on my school today measuring the audio trough the system. The amplification seems to be okay, and no DC is added to the signal. I´m really getting frustrated because i can't seem to pinpoint the problem.

Hope some good soul will take a look at my schematic and PCB layout and hopefully say... Ahhh that is obvious...


Best regards and thanks

Mads, Denmark
P.S. please excuse my english... hope it makes sense.

 

[svon]

need to split digital ground and analog ground . combine them in a single point

 

[child1]

Hi svon

thanks for the reply. I have them split and connected in one point, so i don't think that is it.