Stands for ini isc ong lay. Recorders with MDLP mode can use ATRAC3 compression to fit more material onto a single MD. However, MDLP recordings will not play back on non-MDLP-capable players. There are two MDLP modes: LP2 mode doubles the MiniDisc's normal record time, while LP4 mode gives you four times the disc's normal record time. (This means you can record over five hours' worth of audio onto a single 80-minute MD.) Both modes record in stereo, but the more compression you use, the lower your recording's sound quality.