Cadences: how music punctuates

Phrasing taught you that melodies speak in sentences, with commas and full stops you can hear. Progressions ended on a promise: the moment a journey spends its tension has names. Here they are. A cadence is the standardized way a phrase's harmony lands, or refuses to, and there are only four marks you need: the period, the amen, the question mark, and the swerve. You have been hearing all four your entire life; this page just hands you the pen.

The four marks

Every preset here plays the same phrase: home, then drifting (I, then vi), then two chords of landing, then a bar of silence, the breath from Phrasing. Only the landing changes. Play all four and listen to what the silence does to each:

Four endings, four completely different kinds of silence afterward. That is the whole subject. A cadence is not a chord, it is a landing, and the marks differ in how much of the tension gets paid.

The full stop and the amen

V to I is the authentic cadence, and you already know its machinery: this is the two-magnet snap from Seventh chords doing its official job. Leading tone up, and with V7, the tritone discharging; everything owed gets paid, the silence afterward is content. When a piece of tonal music is over and knows it, this is almost always how it says so.

IV to I is the plagal cadence, and its character comes from what it lacks: IV contains no leading tone and no tritone, so nothing snaps. The phrase settles rather than resolves, which is why churches sing "amen" over it and why it works as a gentle tag after a real ending, a hand on the shoulder once the argument is already won.

The question mark and the swerve

The half cadence ends on V, and this is where the demo's silent bar earns its keep: the phrase stops, the tension chord rings into the gap, and nothing finishes. It is the question mark, and it is also old news to you, because the question phrase in Phrasing, the one that hung on D and refused to be filed as done, was a half cadence wearing a melody. Verses do this in the bar before the chorus for exactly the reason you would guess: a section that ends on a question makes the next section the answer.

The deceptive cadence, V to vi, is the craftiest mark. V promises home, and the ear's melodic demand is even honored, watch the roll and see B rise to C exactly as the authentic version does, but that C is now the third of A minor: the bass stepped aside and the ground moved. A comma disguised as a period. Its classic job is buying time: land on vi instead of I, and the phrase gets to run once more before the real ending, the "one more time" technique, as Janet Schmalfeldt named it, that composers have used to stretch final phrases for centuries and producers reinvent every time a last chorus needs to go around again.

In your music

The extension knows the paid landings by name: run Explain Harmony over these loops and the first two report an authentic cadence and a plagal cadence; the half and deceptive endings carry no template, the chords are labeled but the hanging is yours to hear, which is fitting, since their whole point is what does not arrive. Three experiments, one per mark: end your verse's last bar on V and notice the chorus stop being optional; swap one final V-to-I for V-to-vi and collect four free bars before the ending you were always going to play; and after the last chorus has fully landed, tag IV to I once, quietly, and hear why that move survived four centuries of church. With this page, the harmony path's core run is complete, and the door it unlocks is the climb's summit: which scales speak over which chords, where everything this cluster built meets everything the modal ascent taught.