The Game Boy Sound System (or GBS) is a file format designated to play music designed for the Nintendo Game Boy sound hardware. Game Boy sound has two pulse waves, an arbitrary 4-bit wave channel (similar to the Nintendo Entertainment System's DPCM channel or the Famicom Disk System's wave channel, but with 32 repeating samples in a stereo setup) and a noise channel; it does not have a separate dedicated triangle wave channel like in the NES, although triangle-like samples can be played through the arbitrary wave channel.