SRC stands for Synchronous Remote Control, which is the audio source selection button used to switch between CD, USB, radio, Bluetooth audio, or between songs, as well as for tuning radio stations. Similar to a remote control, it is generally located on the multifunction steering wheel of a car. There are generally two types of synchronous remote controls. The first is used in conjunction with a tension system. The tension system is also a synchronous control device, primarily achieving synchronization through quantities such as rotational speed and torque. The second is a spatial positioning controller, which is used for positional synchronization, mainly applied in systems like robots and CNC machine tools for inter-axis coordination, essentially tracking and positioning between axes. When using SRC during radio playback, flicking it upward skips to the next station, while flicking it downward returns to the previous station. For external playback devices, flicking upward skips to the next track, and flicking downward returns to the previous track or the beginning of the current track. Flicking upward and holding it fast-forwards, while flicking downward and holding it rewinds. How to use SRC in a car: During radio playback: Flick upward to skip to the next station; flick downward to return to the previous station. During external device playback: Flick upward to skip to the next track; flick downward to return to the previous track or the beginning of the current track; flick upward and hold to fast-forward; flick downward and hold to rewind.
