Audio Processing
  MIDI Choir
  La Voz Cantante
Image Processing


GUI design by Loopeytunes

MIDI Choir

This Application will take a single-pitched audio source and transpose it in real time according to the supplied MIDI notes. My main motivation to create MIDI Choir was to be able to sing harmonies live, however the product may also be used for studio work. Below are some of its key features.
  • Reliable ASDF pitch tracker with voiced/unvoiced recognition
  • Pitch tracking indicator
  • Separate processing of voiced vs. unvoiced input, thereby preserving a natural, intelligible sound
  • Voiced input will be re-pitched according to the keys pressed
  • Octave, semitone and fine tunig controls
  • Built-in noise gate with indicator
  • Built-in soft knee limiter with color-coded LED indicator
  • Built-in stereo reverb with controls for room size, damping, stereo width and dry/wet mix,
  • Master volume control with output clipping indicator
  • Effects may also be used without MIDI input
  • Option of VST plugin or stand-alone executable

History of Changes

Version 2.0
  • Completely new rendering engine
  • Improved quality for extreme pitch modification
  • Improved sibilant processing
  • Stereo output with adjustable width
  • Limiter with natural frequency response
  • MIDI input indicator for easier trouble shooting
  • Version info
  • Minor bugfixes
Version 1.0
  • First published release
  • Compatible with 32 bit hosts


Below are 2 short demos using just my own voice and MIDI Choir 2.0 - no other effects, no postprocessing. The first one is spoken, the second is sung.


MIDI Choir is available as a zip archive which contains both the VST plugin and the stand-alone excecutable.
Download MIDI Choir zip archive

   © 2016 by Martin Vicanek