Jog dial

[1] More recently, they are found on handheld PDAs, and as the scroll wheel on computer mice.

Once the dial stops moving, the media continues playing or remains paused at that point.

Once the wheel is released, it springs back to the middle position and the media pauses or begins playing again.

If the device is set or designed to pause after the wheel is used, the audio is often stuttered, repeating a small section over and over again.

This is usually done on DJ CD players, for the purpose of beatmatching, and is equivalent to an earlier turntablist DJ moving a phonograph record back and forth slightly to find the physical location of a starting beat within the groove.

Jog Dial (at center of image) by Sony Ericsson
Edit controller for the analog professional video format U-Matic . With two jog dials for controlling one VCR as source and one as a recorder, c. 1980s
A DJ controller for controlling a DJ mixing software (e.g., a vinyl emulation ) together with digital music files stored on a computer, with two jog dials each having about the size of a compact disc
The remote control for the Apple TV (here 2nd gen.) has a jog dial function for scrolling through videos, as well as the competing Fire TV .