Xen-Arts tells us that IVOR is a two-oscillator subtractive synthesizer that features full-controller MIDI Pitch Microtuning using MTS (MIDI Tuning Standard), where any MIDI Note Number can be freely microtuned to any desired pitch across the MIDI range, thereby enabling musicians and composers to explore the vast expressive possibilities of composing music with alternative intonation systems. IVOR is a freeware 32-bit VSTi for Windows XP or higher and includes a detailed instruction manual, 98 factory patches and 54 microtonal tunings. Here's the full details in Xen-Arts' own words:
IVOR is a microtonal sound-designer's virtual analog synthesizer with a carefully designed ergonomic workflow for quickly creating powerful sounding and musical useful timbres.
IVOR excels at making categories of timbres that include bass, distortion, keys, pads, broken, weird, leads and other analog synthesis types of sounds.
IVOR is an educational tool for learning about subtractive sound synthesis and musical instrument intonation (aka microtuning and xenharmonics).
IVOR embodies a design philosophy of simplicity for microtonal music sound-design...
A 'knob-less' design featuring slider controls only, which enables intuitive direct control with a computer mouse.
A dedicated control signal system mapped to the most important synthesis functions.
Settings are made by typing values into fields, dropdown lists, left-and-right arrows, switches and sliders.
Enables musicians to specify precise microtonal pitch-bend settings.
Features arbitrary microtonal oscillator transposition settings.
Velocity modulation of harmonics enables dynamically playing harmonics of the fundamental pitch.
Pricing and Availability: