How to harmonize your vocals on iPhone
To harmonize your vocals on iPhone, record the vocal in Musaic, open the Audio FX tab for that layer and turn on Harmonies. Musaic works as a vocal harmonizer and harmony maker: it adds voices around your own, a third above that follows the song's key, a fifth above, a fourth below or a bass an octave below, and you set how loud they are. Harmonies are part of Musaic Pro. The free way is to sing the harmony yourself on a second layer.

Musaic - Recording Studio is free for iPhone and iPad. Where a step needs Musaic Pro, the guide says so.
You need: Musaic Pro for Harmonies, and a vocal on a layer of its own. Singing the harmony yourself is free.
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Record your vocal on its own layer
Tap the round record button in the Overview and choose Record video, or Record audio for sound only. Sing the melody. Keep the guitar on another layer: Harmonies shift everything on the layer they sit on.
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Open Audio FX for that layer
Open the Audio FX tab and pick the vocal layer in the sidebar, not All Layers. Further down the page is the Harmonies box, "Voices around yours, in the song's key".
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Turn on Harmonies
Switch on Harmonies. Without Musaic Pro the switch carries a crown, and a tap shows the Musaic Pro offer. Musaic now renders the voices for this take: the box shows Preparing the voices…, and they play as soon as the bar is full.
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Choose the voices
Tap the Voices row. Third sings a third above you and follows the key, Fifth a fifth above you, Fourth below sits between you and the bass, and Bass is an octave below you. Switch on one or several, each with its own Level, then tap Done.
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Set the level and listen
Level sets how loud the voices are against your own, from -24 to 0 dB; it starts at -11 dB. Press play to hear the harmonies with the song. The export uses the same voices you hear.
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Four voices Pro
Third, Fifth, Fourth below and Bass, alone or stacked into a small choir.
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In the song's key Pro
The third follows the scale of the song. Fifth, Fourth below and Bass are fixed intervals and need no key.
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A level per voice Pro
One Level for all voices, and a trim from -12 to +6 dB for each voice in the Voices sheet.
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Sing it yourself
Record the harmony as a second layer while the melody plays in your headphones. In a Mosaic video it gets its own pane.
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Is Musaic a harmony generator?
For your own voice, yes. Harmonies generate extra voices from the vocal you recorded, in the song's key. Musaic does not write a harmony for a melody you have not sung, and it does not teach harmony theory.
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How do I harmonize vocals for free?
Sing the harmony yourself on a second layer while the first plays in your headphones. Recording, layers and Audio FX are free. The guide How to sing harmonies with yourself has the steps.
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Why can I not hear the third?
The third follows the song's key. Until Musaic knows it, the box says Needs the song's key. The key comes from a song or guitar layer once Musaic has analysed it. Fifth, Fourth below and Bass sound without a key.
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Do Harmonies change my take?
No. They are an effect on the layer. Switch Harmonies off and the take sounds as recorded. Switching them off is free, also after Musaic Pro ends.
Musaic - Recording Studio is free on the App Store for iPhone and iPad, with weekly challenges and Ideas. Musaic Pro adds lyrics, animations, chord detection and Audio Lab, and removes the watermark.
- How to sing harmonies with yourself on iPhoneGuide
- Audio effects for every layer: reverb, EQ and compressionGuide
- How to make your vocals sound better on iPhoneGuide
Written for Musaic 2.1.0.