Wish my ears were as good as theirs…
Hope this link works.
Jealous at a dog....?
That’s pretty cool! Wonder how much practice that took?
Wow! Some of it is pattern recognition too. I noticed the Golden dog hit the note before the girl a couple times around the 1:00 mark. Maybe the “trainer” was being trained by the dog there 
The golden dog is really super eager on this.
There is another vid where the darker dog is being trained. It is almost 7 minutes and a lot of cutting in it. She might have spend more than several hours (and a ton of biscuits!) on it, I think. Still, it’s really cool, especially the fact the dogs make music together. I am actually in discussion with my Maine coon cat now … 
. No hopes though…
Yeah, it is awesome that the dogs are doing it. I’ve got my cat trained to sit, stand up, and stand up and give me five. I tried teaching him to lay down for a long time, but he doesn’t seem to understand. I guess I don’t speak feline well enough.