The Sample Edit page contains controls allowing you to modify the playback settings of a given sample. From left to right, the icons represent Reverse, Pendulum, Loop, and Hold.
Loop Modes Explained:
Reverse – Toggle to play a sample in reverse.
Pendulum – When active, Arcade will play the sample forward and then backwards from the respective Loop points.
Loop – Most Sample voices have looping enabled by default. Click the Loop icon to disable looped playback on a Sample
Hold – When active, a Loop voice will sustain after indefinitely the key is released. To stop the Sample from playing, either press the key again or press the stop button on the bottom right-hand side of the keyboard.
The Hold function can also be activated by right-clicking the respective White Key in the GUI keyboard then selecting the Hold option: