CEA-861 signals carried by HDMI are electrically compatible with the CEA-861 signals used by the digital visual interface (DVI). No signal conversion is necessary, nor is there a loss of video quality when a DVI-to-HDMI adapter is used.
The Hum is a generic name for a common class of phenomena consisting of a persistent, invasive low-frequency sound from an unknown source. In addition, the phenomena is only audible to certain people, existing at the far low end of the audio spectrum, with a peak power spectral density between about 10 and 60 Hz.
Informal lacking interest or inspiration; dull; mediocre. a ho-hum collection of new releases. hum tone. n a note produced by a bell when struck, lying an octave or (in many English bells) a sixth or seventh below the strike tone, (Also called (esp. Brit.)) hum note.