OPx-4

OPx-4 from AIR Music Technology is a four-operator FM synthesizer that makes deep FM sound design approachable, even if you’ve never touched FM before. Its clear layout and hands-on controls let you experiment freely, while the 4×4 FM matrix, 32-slot modulation matrix, dual-mode filter with 23 types, six tempo-synced envelopes, two LFOs and two ramps give you serious depth when you want it. Shape classic electric pianos, bright 80s-style digital tones, evolving pads, or strange sound effects using wave looping, sample offset and flexible wave shaping. Three insert and two global effects slots draw from 27 AIR effect plugins, so you can add reverb, delay, distortion or modulation without leaving the instrument. Eight assignable macro knobs keep everything performable. It suits hobby producers and sound designers working in FL Studio, Ableton or Logic who want expressive FM tones without a steep learning curve.