No sound through HDMI to DVI cable

I got a new samsung lcd recently and hooked it up to my pc's Geforce 8800GT with an hdmi to dvi cable. The picture comes fine on the tv but there's no sound. I read around on forums and figured out that sound can't come through an hdmi to dvi cable and nvidia graphics cards don't have onboard sound. A friend of mine also hooks his pc to the tv and told me that he uses a seperate audio cable as well. So I went to the shop and asked for one. They gave me one (forgot name) and I hooked it up from the tv to my sound card am still not getting any sound.

Can anyone tell me what wire/equipment I need specifically to get sound from my PC to the tv? Thanks in advance.

Yeah, I figured that part out. Thats why I wanna know what equipment/wires I need to be able to get sound as well.

if you want audio from HDMI output of your videocard
it should be hdmi to hdmi. there's no audio for dvi, you have to use a different wires for that.

http://www.palit.biz/main/faq_show [...] vga&id=101


How to use HDMI audio? (For nVIDIA-based graphics cards only)

1.Through Internal SPDIF cable: (As Pic #1)
Step a. Use the internal SPDIF cable, plug one side of the cable into the SPDIF-in header on the graphics card.
Step b. Plug another side of the cable into the SPDIF-out header on the motherboard.
(Different motherboards may have different SPDIF connectors, please follow the instruction of the motherboard.) ** Red line is for signal (+), Black line is for ground (-).




2.Through external optical SPDIF cable: (As Pic #2)
Step a. Use the external optical SPDIF cable, plug one side of the cable into the SPDIF-out port on the back of the motherboard.
Step b. Plug another side of the cable into the SPDIF-in port of the graphics card.



After finish connecting the SPDIF cable, you also need to switch audio output to digital output in the operation system. (To know how to switch audio output, please refer the manual of the motherboard.)

^^ Yeah, but how few LCD's even have a SPDIF port anyways?

Basically, it comes to this:
Analog: VGA + RCA (can convert a 3.5mm mini to RCA stereo pretty easily)
Digital: HDMI or DVI + SPDIF

Note that most TV's have a Digital/PCinput mode and an analog mode, so you usually can't mix and match. If you lack a HDMI port and SPDIF port, you're only option is some sort of box that takes the signals you have from you're PC and convets them to something the TV can use.

...its DVI to HDMI, not HDMI to DVI; you had me thinking backwards...

To be clear: You are outputting via DVI, converting to HDMI, and then plugging into you're TV, correct? If so, see jiro's post above.