Why is there a delay between DAB and analogue radio?
A. If you were to listen to the same station on two radios, one analogue and one DAB, you would notices a few seconds delay between the two – with the DAB broadcast slightly after the analogue. This is because all station transmissions start as an analogue broadcast and then the signal must be transformed into a digital transmission using Mpeg2 encoding and COFDM modulation. The digital signal must then be converted back to the sound that you can hear by the radio. This takes a couple of seconds – resulting in the delay when you hear it.
