CANTOR 2.0 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. We recommend checking the downloaded files with any free antivirus.
The actual developer of the software is VirSyn Software Synthesizer. The program lies within Multimedia Tools, more precisely Music Production. Commonly, this program's installer has the following filenames: Cantor.exe, CANTOR2.exe, CANTORDemo.exe and _B89D6CF1EB402A2E710B03.exe etc. This PC program can be installed on 32-bit versions of Windows XP/7/8/11. The most popular versions of the tool are 2.1 and 2.0.
From the developer:
The human voice is the most sophisticated and versatile instrument used in musical expression. With CANTOR an exciting new era of realtime vocal synthesis begins right now ! Imagine entering your lyrics in plain english and then “sing” your lyrics instantly just by playing the melody on your MIDI Keyboard.
You may want to check out more software, such as Voxengo LF-Max VST, VertexDSP vxPlug or iConcertCal, which might be similar to CANTOR.