Just got my installation up and running! Everything works perfectly, except there is no sound. How can I get my sound working?

System specs:
Processor: Intel Core 2 Duo E8400
Video: ATI Radeon 3870
Audio: Intel 82801I HD Audio Controller / ATI Radeon HD 3870 Audio device
Network controller: Broadcom Corporation BCM4328 802.11a/b/g/n
RAID bus controller: Intel 82801 SATA RAID Controller

For the installation, I used these settings:

iATKOS v5i Main System
PC EFI V9
AppleDecrypt
(added SMBIOS-EFI)
9.5.0 Kernel Voodoo
Stock ACPI Modified
Disabler.Kext
ATI
SATA/IDE > Intel AHCI SATA
NTFS-3G