This may be an impossible problem to solve..we just got a Hitachi 51m200 rear projection tv. it does not have an hdmi slot although the tv says it is dvi-hdtv and our cable box is hdmi output. so if i get a hdmi to dvi adapter what can i hook up to get the sound from the cable box?

I use xbox 360 same problem.It cant us speakers on tv i need a sound bar.And can i get hd quality

It isn't impossible at all. You may need a sound bar if you don't already have a Bose surround sound system or a boom box or something else you can use without purchasing anything. On the hdmi/dvi televisions and cable boxes of the recent past there would always be an accompanying white and red composite/RCA slot (output on the cable box, input on the television) to accommodate this. You would simply connect the hdmi to dvi cable from the television to the cable box and then the red and white audio cable. If your television and cable box does not have the red and white composite/RCA audio input and output you will need to connect the cable box to an external audio source. How to do it and what to connect it to depends on what audio output that is on the cable box (usually is on the back of it). You might need a fiber optic cable and a sound bar with a digital audio input if you have a newer cable box.