How to sing harmony with yourself

Updated 2026-09-02

Sing the melody once and let it repeat, then sing a third above it while you listen. That is the whole technique. The part people get wrong is not the theory — it is that they try to sing the harmony from memory instead of tuning it live against the loop playing in their ears.

Which note to sing

A third above the melody is the safe default and the one your ear already knows from almost every pop chorus. A third below is warmer and sits better under a high lead. A fifth is more open and slightly medieval; an octave is not really harmony but thickens a chorus enormously.

If you sing one interval consistently through a whole phrase it will clash somewhere, because the chord underneath moves. Singers who improvise harmony are mostly moving between a third and a fourth to stay inside the chord. You will hear it when it goes wrong long before you can explain why.

Finding the harmony without knowing any theory

1. Record the melody and let it loop. Listen through two or three repeats without singing.
2. Hum any note and slide it slowly upward until it locks. There is an unmistakable moment where two notes stop sounding like two notes.
3. Hold that note and sing the phrase keeping the same distance from the melody.
4. If it sours in the middle, let that one note move by a step and come back. That is what a real harmony singer does.

This works because you are tuning against something you can hear, not against an idea of the note. It is also why headphones matter more here than for any other kind of looping.

Why your second part drifts flat

Almost always because you cannot hear the first one well enough. Sung through a phone speaker, the loop competes with the sound of your own skull and you unconsciously push under the note.

Wear headphones. Wired is best, and if you use AirPods expect a delay you will need to compensate for — there is a separate guide on Bluetooth latency, and Jam Looper has a Bluetooth latency offset in Settings for exactly this.

The other cause is fatigue. Harmony parts are usually held longer than melody parts, and a tired voice sags. Record the harmony before the twentieth take of the lead, not after.

What the app does and does not do for you

Jam Looper records what you sing. It does not correct your pitch, and it does not generate a harmony for you — those are different products, and if you want a machine to invent the second part, a harmoniser is what you are looking for.

What it does give you is 4 free tracks, which is a lead plus three harmony parts, and 8 with Pro if you want a full choral stack. There is per-track reverb, delay, distortion, tremolo, pan, pitch shift, low pass, high pass and resonance; pitch shift is the one people reach for to fake an octave they cannot sing.