AdPlug is a free, cross-platform, hardware independent AdLib sound player library, mainly written in C++ and released under the LGPL. AdPlug plays sound data, originally created for the AdLib (OPL2) and Sound Blaster (Dual OPL2/OPL3) audio boards, directly from its original format on top of an emulator or by using the real hardware. No OPL chip is required for playback.