UltraChoir — Support

UltraChoir is a multitouch vocal synthesizer for iPhone, iPad, and Mac. Rest your fingers on the Choir Field and slide to play a choir of real, breathing voices.

Getting started

• Play: Rest one or more fingers on the Choir Field. Left–right is pitch; up–down morphs the vowel (oo → ah → ee) and the dynamics. Press harder to swell, lift to let it breathe.
• Chords: Pick a progression at the top. Tap the thumb-board pads to play chords, or switch to Auto to let the progression run. Choose any scale and key.
• Shape the sound: Use the sliders — thickness (how many voices stack on a note, up to 10), vibrato speed and depth, reverb, and the attack / sustain / release envelope. In landscape, the sliders line up in a column down the right side.
• Go deeper: Open Settings (the slider icon) for the full voice model (tongue, lips, nasality, tenseness, breath, glide, vocal-tract length), the instrument catalog, the modulation matrix, and saving or loading presets.
• Controllers: Connect an MPE or MIDI controller to play UltraChoir from hardware.

Tips

• Use headphones or a good speaker — the detail is in the breath and the vowels.
• No sound? Tap the field once to (re)start audio, and check your device isn't muted.
• For the widest performance surface on a phone, turn to landscape.

Frequently asked

Does UltraChoir need an internet connection or an account? No. It runs entirely offline and needs no account.

Does it collect any data? No. See the Privacy Policy.

What devices does it run on? iPhone and iPad (iOS/iPadOS 18 or later) and Mac (macOS 15 or later).

Contact

Need help or want to send feedback? Email philipkohn@gmail.com and I'll get back to you.