Fsynthz has released 15E Sync Modulation Synth, which is a member of the "15" family. It's available for Windows as a VST instrument plug-in and it is free.
15E features a "sharp and lash sound based on crossfaded 4-operatored sync synthesis with subsequent subtractive routing". The overall sound spreads from general purpose to acid. The letter "E" stands for the enveloping of six core parameters simultaneously, this being the main difference of this synth from others of the family.
- Designed for any random set of controls to sound good and playable.
- 3 stereo tools (used simultaneously).
- 2 dedicated operation modes for ModWheel.
- Compact GUI with tooltips on controls.