create_group_control
parent = create_group_control(multi, &index, 0, S_null, "AC97 mixer");
parent2 = create_group_control(multi, &index, parent, S_null, info->name);
parent = create_group_control(multi, &index, 0, S_null, "Recording");
parent2 = create_group_control(multi, &index, parent, S_null, info->name);
create_group_control(data->controls + 0, 0, 0, 0, "Record");
create_group_control(data->controls + 1, 1, 0, 0, "Playback");
parent = create_group_control(data->controls +0, 0, 0, 0, "Record");
parent = create_group_control(data->controls +1, 1, 0, 0, "AC97 Mixer");
parent = create_group_control(data->controls +2, 2, 0, S_SETUP, NULL);