Intervals. We know ‘em when we hear ‘em, right? Can you sing one when you’re asked? Can you read it in music? Intervals (which lead to scales and key signatures) are some of the toughest concepts for young musicians to learn, especially singers. But, all musicians must know their intervals — the measured distances between individual notes. Knowing intervals helps you read music faster and more accurately.

Pianists can press a couple of keys, brass players can press a valve or two, and the result will usually be the same each time. Singers learn intervals by feeling the resonance in their heads and throats, while listening to the sound that come out of their mouths — and that can mean endless variety of pitch. A tuner can help singers identify intervals before they begin to associate them with a “feeling” in their own bodies.

Music teachers always use common melodies to teach intervals; for instance, the perfect fourth interval sounds just like the beginning of “Here Comes The Bride,” and the opening notes of “Somewhere Over The Rainbow” comprise an octave. Other intervals are harder to quickly identify in music because  . . . they sound weird, they aren’t used in music that people can recall instantly, or they’re hard to sing. To the rescue, a few YouTube videos that I found helpful:

1.  “The Interval Song,” a Latin-beat ditty by a British composer named Django Bates. May also make a good drinking game for college theory students. Sing it a few times and you will know it forever.

2. “Interval Song” by Anonymous. I have never heard this one before but the song and the performer are both really cute. I like any song that attempts to rhyme “octave” and “provocative.”

3. “Intervals In Inversion Song,” by David Newman. I’d like to hand this guy a rose for coming up with this hilarious song. I love the wonderfully sappy piano accompaniment.

4. For kinesthetic and visual learners, check out Leonard Bernstein’s “Young People’s Concerts,” which devotes an entire hour to intervals called  “Musical Atoms.” Might be interval overkill for some, but if you’re at all interested, it’s an hour well spent.

Do intervals really matter? Ask him.

Entertaining the idea of an MBA? Watch The House Of Eliott and you’ll learn everything you need to know about business.

Beatrice (Stella Gonet) and Evangeline (Louise Lombard) from "The House Of Eliott". No copyright infringement intended.

The series, which aired on the BBC in the 1990s (and is now available on YouTube), follows a pair of sisters who launch a fashion house in 1920s London. The plot twists are pure soap opera, mixed with leftover costumes from Brideshead Revisited. But the foundational story is the process of growing a business from scratch.

The sisters — plucky, Kate Hepburn-esque Beatrice and luminous young Evangeline — discover that their selfish father’s bad business decisions have rendered them destitute, while their sheltered upbringing has left them unable to find work. Talented at sewing and little else, the sisters began to turn their deceased father’s expensive old clothes into fashions for themselves. The naturally organized Beatrice finds work as a photographer’s assistant, a few society ladies see their creations . . . and the House of Eliott is born.

As the opportunities grow, so do the challenges. They hire additional help to keep up with demand. They debate closing the doors to become designers at a Paris fashion house (they decline, and then Evangeline has an affair with the boss). Beatrice and the photographer fall madly in love.

Successful but cash-poor, The House of Eliott is under constant stress. Beatrice and Evangeline negotiate loans with condescending bankers who steal from them. Their workers fight. Their first ready-to-wear line is undermined by cheap copies. The photographer, who becomes a filmmaker, is elected to Parliament. The Great Depression begins to affect sales. Even though both sisters marry and Beatrice becomes a mother, the House of Elliott remains their most precious creation.

Jack Maddox (Aden Gillet) with the sisters Eliott. It's always the photographer.

Like Beatrice, I’m a mom in a creative profession, married to a dashing photographer! We’re working and learning about growing a business together — his photography and printing, and my voice studio. We’ve already faced some of the same challenges the sisters faced, and we’ve also enjoyed some of the same happiness when things actually go right. (I also have a beautiful younger sister, but she’s an RN and wears scrubs.) The House of Eliott is a great way to unwind after a long day at the home office. Yes, there are other shows about family businesses, but they don’t have such fabulous gowns.

Intrigued? Here’s another British-accented actress dispensing business advice.

Merry Christmas!

Margaret Tyler, mezzo soprano and Eden Casteel, soprano singing “He Shall Feed His Flock/Come Unto Him“ from Handel’s Messiah. Directed by Joseph Ripka, with Josh Stafford on the organ. Recorded live, Sunday December 18, 2011 at Calvary Church, Stonington CT.

Eden and Margaret, doing the Handelian thing. Photo by the shivering Ronald Cowie.