Hi Viclin,

The songs are pre-loaded when the device in idle state. Pre-loading song take around 2 seconds then the playback can be start instantaneous.
If the songs are in same sample rate the next song already preloading during the previous song playback, and the next song can be started with the footswitch instantaneously.

Please make sure the LP-16 updated to the current firmware release: LP-16 Firmware 83926 (October, 2015)