LOS ANGELES — If the music to the Season 9, Episode 5 installment of Fox’s animated sitcom “Family Guy” had a relaxed feel, maybe it was because of the 104-degree mineral water.

Glenn Morrissette helped orchestrate the score after a leisurely soak last October in the natural hot springs in the tiny northwestern Wyoming town of Thermopolis.

Morrissette did his work from his recording studio on wheels — an RV he calls home as he meanders around the country.

Working from home is not uncommon for professional musicians, who have replaced the room-size recorders and sound mixing systems of the 1980s with laptops and specialized software. Going a step further and working from the road eliminates many of the interruptions that come with working in the city.

Nearly two years ago, the 41-year-old composer, who works mainly in TV and film production, looked around his Burbank apartment and realized his belongings had taken over. “Careless consumerism” is how he describes it.

He made a list of the things he needed to be happy. “It was a pretty short list,” he was surprised to discover: his woodwind instruments, his laptop, a week’s worth of clothing, a good book and an electric razor.

The rest he sold or gave away.

On his way to a rehearsal one day, Morrissette stopped at a traffic signal in his Miata sports car and glanced up at a modest-size motor home in the next lane. “I could probably live in that now,” he thought.

He made another list, this one of every reason he could think of why he shouldn’t ditch his apartment and move into an RV. “I went through figuring out how I would deal with each issue. And pretty soon there was no list left.”

It took about four months for him to break free of “the gravity that was pulling me into the comfort zone of Burbank” and its environs, he said. After a few shakedown jaunts to the Santa Monica Mountains and places like Lake Hughes, the Corrizo Plain and Ojai, he was ready to hit the road.

He was headed for the interior of Arizona in February when an appendicitis attack forced him to stop in Parker, Ariz., for outpatient treatment.

But he’ll soon be heading off the beaten track again, he said.