Piano Guidance
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What is a jazz triangle?

C∆ Though it should be an easy answer (it's an abbreviation for a major seventh chord), I was compelled to chime in because most of the other answers were either flat out wrong or incomplete. Remember, “major” could refer to the third in this chord (C major triad), or to the seventh.

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Well, there is this triangle…

There is a running gag between me and the singer/bandleader of a favorite project I am in, Generation Esmeralda. Let’s just say that triangle is super groovy but also so incredibly loud on stage, Jimmy sends me to the other end of the stage with it because I can’t hear nothing but it next to my ear. We always get a good laugh! Here is Jimmy playing cowbell. Nothing beats that little triangle in terms of decibels, though. Tony Baker, Micky Valentino, Roberto Quintana, Jimmy Goings, T Moran, Ariane Cap, Steffen Kuehn, Louis Fasman, Tom Poole, Mike Rinta

Back to Triangles – The Triangle in Jazz

I doubt that is the “triangle in jazz” the Quora poster was talking about when they asked me for clarification on its meaning. meant when asking me about that triangle. Rather, the Quoran meant this one:

as in:

C∆

Though it should be an easy answer (it’s an abbreviation for a major seventh chord), I was compelled to chime in because most of the other answers were either flat out wrong or incomplete. Remember, “major” could refer to the third in this chord (C major triad), or to the seventh.

I have an Ari Shortcut rule for this:

The third – unless otherwise specified – is always major!

The seventh – unless otherwise specified – is always minor!

So when you see C major 7th, that is short for C (major) major seventh, a major triad with a major seventh on top. The major belongs to the seventh. It is that first major that is redundant because the triad is major, which is the default value for the triad!

Let’s test this

How about C minor 7? The minor now belongs to the triad, because the seventh is minor by default. So, C min7 is short for C minor (minor) 7th. It is that second minor that is redundant because the seventh is minor! The minor belongs to the triad! How about C7? Major triad (default, I don’t need to specify!) and a minor 7th (again, it’s understood). C (major) (minor) 7th. C7 for short, the dominant seventh chord, a major triad with a minor seventh on top! And what if I want the triad to be minor and the seventh to be major? Then I have to spell it all out: C min maj7. That is a beautiful chord. It does not occur in our major/minor system, but it sure does in the harmonic and melodic minor systems and it is gorgeous. Since it is not the most frequent, it evolved to be the one that needs to be completely spelled out. Read my Quora answer below which got me thinking about four-note chords in general. It’s all about stacking thirds and there are only so many ways you can stack major and minor thirds. Grab your bass and play through all of these. This is useful not just for Jazz, as many styles have major seventh chords in them!

Enjoy!

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Cristofori called his instrument the gravicembalo col' piano e forte – the “harpsichord with soft and loud.” Eventually this lengthy name got shortened to pianoforte, and from there it was just a short step to “piano” all by itself.

I always enjoy telling the story of how the piano got its name. Piano means “soft,” in Italian, and it seems a little strange that an instrument that can weigh almost a thousand pounds and compete in volume with a symphony orchestra should be called a “soft.” Well we have to start with the piano’s predecessor, the harpsichord, or gravicembalo, in Italian. The strings of a harpsichord are plucked, not struck, and no matter how hard, or how softly, you press the keys, the sound volume stays the same. But in about 1700 an Italian named Bartolomeo Cristofori invented a keyboard instrument with little hammers that strike the strings, and now by varying your touch on the keys you could vary the volume. Cristofori called his instrument the gravicembalo col’ piano e forte – the “harpsichord with soft and loud.” Eventually this lengthy name got shortened to pianoforte, and from there it was just a short step to “piano” all by itself. This has been A Minute with Miles – a production of South Carolina Public Radio, made possible by the J.M. Smith Corporation.

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