my Windows 7 x64 can play sound using IDT-Audio of my DP35DP from first minutes, but through green (front left/right) port only.
i tried to install Vista driver (AUD_allOS_D20001.0x_PV_IDTGUI_v105_Legacy)
seems like installation was successfull, but result is no sound at all
so i'm using native Windows 7 drivers now
and waiting for Intel developers
i had ever tried win 7 beta on DP35DP. the sound works..
well you should try installing the driver that running sigmatel sounds driver. i can hear sound and song using that particular released driver on intel website some time ago.
the only issue i have for Win 7 running on DP35DP is the Intel management Engine driver..
i really wonder when will intel enginner release supporting driver for Win 7...
ps: to Intel: you never let me down with you Solid MOBO.. KEEP IT UP!