SND_BGM_OFF = 0
SND_BGM_FM26 = 1
SND_BGM_FM86 = 2
SND_BGM_MODE_COUNT = 3
SND_BGM_MIDI = 3

SND_SE_OFF = 0
SND_SE_FM = 1
SND_SE_BEEP = 2
SND_SE_MODE_COUNT = 3