Audio plaback on laptop
I wrote simple audio playback application on c++ via latest DirectX SDK. On PC it working fine (Windows xp, Vista, Windows 7), but when I execute application on laptop it produce only silence.
What differnce between audio on PC and laptop?
This is going to be a hardware setup problem on your laptop. Make sure the laptop has all the latest sound drivers, also check that it isn't muted, etc etc.
Run DirectX Diagnostisc for check problems with DirectX.
Go to the: Start -> Run -> Type: dxdiag
Install the latest version of DirectX on the laptop.