FXBUS_PCM_RIGHT
A_C_00000000, A_FXBUS(FXBUS_PCM_RIGHT), &pc);
FXBUS(FXBUS_PCM_RIGHT), C_00000004, &pc);
m->fxrt1 = FXBUS_MIDI_CHORUS | FXBUS_PCM_RIGHT << 8 |
m->fxrt1 = FXBUS_MIDI_CHORUS | FXBUS_PCM_RIGHT << 4 |