The 3.5mm auxiliary jack also came into play at the same time, allowing portable digital media players to provide the sounds.
Further developments for car audio came in the early part of the 21st century.
A short distance radio system called Bluetooth, initially intended to provide mobile or cellular phone access on the go, was quickly modified to carry audio from a source such as a mobile phone.
Digital radio is also slowly growing in Australia, with a number of international brands, prior to the closure of Holden and Ford as manufacturers in Australia, providing DAB or Digital Audio Broadcast units in cars.
Access to DAB is region limited, however, in that it’s available in capital cities but not outside the boundaries.
However, applications or “apps” can be installed on a smartphone that use the cellular networks to access music sources on the go, or enable an app built into the vehicle’s audio system to work.