Download of KX-SNTH-X16 4.3 was on the developer's website when we last checked. We cannot confirm if there is a free download of this software available.
We cannot guarantee that the program is safe to download as it will be downloaded from the developer's website. Before launching the program, check it with any free antivirus software. The latest version of the program can be downloaded for PCs running Windows XP/Vista/7/8/10/11, 32-bit. The following versions: 4.3, 4.2 and 3.3 are the most frequently downloaded ones by the program users. The software lies within Multimedia Tools, more precisely Music Production. This free software is an intellectual property of Xavier Kalensky.
From the developer:
KX-SYNTH-X16-V4 is a vintage modular polyphonic synthesizer. A virtual analog based on the VCS3 structure with great features such as built-in sequencer, EMS synthesizer, oscillator simulation, noise generator with EQ, ring modulation, polyphony and much more.
You may want to check out more software, such as Jupiter-8V or OtsDJ, which might be related to KX-SNTH-X16.