HDMI is digital only. DVI can be Digital or Analogue. This cable will connect the Digital of the DVI to the Digital HDMI. There s no sound sent via the DVI connector it is picture only. Sound will require an additional cable (usually a jack to jack jack to 2 phono or optical cable). HDMI stands for High Definition Multimedia Interface some of the worlds largest audio visual manufacturers have signed up to the HDMI specification. Over the next few years HDMI will become the mainstream interconnect replacing analogue cable systems such as the scart common in Europe.