Tap and/or drag on the inversion panel to quickly select the number of automatic harmony voices, and the inversion of the generated chords. Cyan ovals represent automatic voices above you, and yellow ovals are voices below and including your own. Try playing with inversions as you sing to get a feel for the different harmonic colors you can achieve just by re-voicing the chord!

Sometimes no harmony is best! If you just want to sing a solo phrase, you can drop to one voice by tapping the leftmost oval.



Presets are what define the harmonic colors generated by the three auto-harmony voices. Try exploring different presets by tapping the left or right arrow buttons. Try changing the number of voices and the inversion in each preset and see how it sounds.

The yellow numbered buttons are shortcuts to the first 6 stored presets. You may re-arrange presets by tapping the preset name, which will present an editable table view.

If you’ve edited the preset by changing either the harmony, inversions, or autotune settings, an asterisk (*) will appear after the preset name, and tapping will allow you to save and name a new preset.



This is perhaps the most important part of the Harmonizr screen.

For each note of the chromatic scale, you can select Major (note name), Minor (min), and Dominant (7) key centers. The current key center is highlighted in cyan. Note the similarity to the layout of a piano keyboard. Here, instead of playing single notes, you're selecting entire harmonic systems.

Harmonizr will generate up to 3 voices of automatic harmony based on the key center and which note you're singing. For reference, the note you're singing is highlighted in red.


MIDI and Autotune

By default, Harmonizr uses MIDI input to select key centers. This way, if you're playing a song and accompanying yourself on the keyboard, harmony will be generated in the correct key.

It is also possible to enable MIDI voices. Just tap the Midi button, and in addition to the automatic voices, Harmonizr will pitch-shift your voice onto every note you play. You can turn off auto-harmony by selecting a single voice in the inversion panel.

Autotune operates on only one voice - your own. Depending on how the preset is configured, pitches can be constrained to just the chord, just the scale, or tuned to the full chromatic scale. Since the other voices are tuned perfectly anyway, you may find you have less need for this than you think.



Harmonizr is built from the ground up to be compatible through conforming to the Audio Unit v3 interface. You can use Harmonizr as an effect in any app that acts as an AUv3 host.

If you'd like to use Harmonizr with other apps, slide the background switch to the on position. This enables Inter-App Audio, and enables you to control Harmonizr with an external MIDI app. Using SoundPrism as a controller is a lot of fun, and there are many others available!