How to get sound from xbox 360 conected with hdmi to dvi

hey guys so, I have an xbox 360 and I play it on my monitor with hdmi to dvi cable
the hdmi goes into the xbox and the dvi into my monitor
but there is no sound, and I know that the dvi does not have sound :( .
I saw a lot of solution like taking the case out of the av cable
but I thought why taking out the case of the av cable while I can use the sd av cable wich is thineer
and then use the rca female to 3.5mm jack female
for the audio
and I was wondring if the sound will work with the sd av cable??
i really need your answers
thank you