Legacy Game Boy pulse channel with sweep
Legacy Game Boy pulse channel
Legacy Game Boy programmable wave channel
Legacy Game Boy noise channel
8-bit PCM DMA channel driven by software mixing
8-bit PCM DMA channel driven by software mixing
The GBA inherits the Game Boy's 4 hardware channels and adds 2 Direct Sound DMA channels for PCM sample playback. Most games use software mixing on the ARM7 CPU to play many more simultaneous instrument samples through the 2 DMA channels.