J4F00,

I share your preference for samples without vibrato and adding vibrato using a controller or control data. However, many prefer hearing the vibrato without having to operate a controller. I think Yamaha's "sweet" voices are sampled with vibrato. If you think of arrangers mainly as instruments for live entertainment, then I think you can see why it might be nice to be able to have vibrato without operating a controller. I thought the SD1 could accept user samples--if so, add some without vibrato.