I've always found tool use to be a strange metric considering the number of humans I've seen over the years that can hardly use things that automate all the work. I would count this as a tool, but cats and dogs can communicate with sound boards and I've seen in person that parrots can go beyond just sound mimicry using them as well via touch screen equivalents. I suspect pigs could probably do well with this method too. I don't have the financial means to make a study on this happen but I would like to see if any animals could teach their own children to communicate with a sound board. I'm quite certain that we have been underestimating animals for a long time.