Your daughter is completely wrong. The dog loves the music and wants to join in. That's my opinion. When dogs don't like a noise (like the noise of a vacuum cleaner, for instance) they either flee from it, or they run around barking, threatening, and protesting until the noise stops. I've seen this numerous times with vacuums and other machinery.

There are several reasons for a dog to howl...

1. Communal celebration and communion with the pack or with other nearby dogs. I've witnessed that many times, specially in Trinidad, where there are a huge number of outside dogs. At certain moments in the night they will all start howling together for about a minute, and it just goes up to the sky like a strange, heavenly chorus. Wolves, coyotes, and hyenas do the same thing.

2. In mourning. Dogs will howl in grief if someone they love has died or is missing.

3. In loneliness and/or fear or forboding. A dog that has been left alone in a car or house will often howl in lonenliness until his family returns. Many dogs that sense an imminent earthquake will howl, prior to the first tremors being felt by humans.

So, it can be either a joyful thing, in which case it's singing...or it can be a mournful or fearful thing.

I am 100% sure that your dog loves to sing along with the saxophone, and that's why he comes to you. I find that most dogs can be enouraged to howl along by either playing a harmonica or by just howling like a dog yourself to give them the idea. They like it, and they will join in enthusiastically. A human voice howling certainly would not hurt a dog's ears. They will also howl along with the sound of a passing ambulance or police siren. It's almost like the laugh reflex in humans. We often laugh automatically, triggered by the laughter of others. The dogs are like that when it comes to howling.