ReSing Choir is IK Multimedia's standalone AI vocal production application, released on 11 November 2026. It takes a single monophonic vocal and turns it into an editable choir of up to five modelled singers per song section, using the voice modelling behind IK's ReSing plug-in. IK says the singer models are made with the full participation, consent and fair compensation of the original artists. It is $149.99 at its intro price until 31 December 2026 (regular $199.99), with a $99.99 upgrade for eligible IK owners.
Each singer is a colour-coded Voice Card set to Source (following your original pitch curve), Unison (following the melody with editable, scale-quantized notes) or a Harmony part up to three steps above or below. Draw chords in the Chords Lane and the Harmonize slider balances the parts between the melody and the chord tones, while notes you edit by hand stay locked. A shared piano roll shows every line over your original pitch curve, with Cut tools for counter-melodies, per-note Vibrato and Transition smoothing. Auto-character, Timing, Variation and Detune keep the stack from sounding mechanical, and per-singer Pan and an integrated Reverb finish the mix.
A project holds up to ten sections, each with its own source vocal, singers and instrumental reference. Ten starter voices are included, and any ReSing singers or ReSing Modeler models you own, including a model of your own voice, are available too. Processing is entirely local, and each section exports as a mixdown, dry stems or both. The trade-offs: it is standalone only, renders offline rather than in real time, needs a clean monophonic take and takes 9 GB of disk.
Against Klevgrand Altitude Harmony, a real-time harmonizer that adds up to three shifted copies of your own voice, and iZotope VocalSynth 2, a vocoder and robot-voice processor, ReSing Choir is the one that builds a natural-sounding group of different singers. Our ReSing Choir first look covers every feature, the specs, pricing and the full comparison.