Plogue Teases Chipsynth OPMZ: Four Yamaha 4-Op Chips in One Plugin

Six-operator FM gets most of the attention, largely because the DX7 cast such a long shadow. But a great deal of the FM sound that people actually remember from the late eighties came from Yamaha's four-operator chips — cheaper, quirkier, and in some cases more characterful than their flagship sibling.

On 29 August 2026, Canadian developer David Viens of Plogue teased Chipsynth OPMZ, a new FM synthesizer plugin that models four of those chips in a single instrument.

The Four Chips

Plogue has not released full specifications yet — only the chip list. That list is the interesting part.

OPM (YM2151) arrived in 1985 and is best known from arcade hardware; Sega's Out Run is the canonical example, and pinball machines used it too. It is the sound of a specific era of coin-op audio.

OPP (YM2164) is the chip inside the DX21, DX27, DX100, and the FB-01 module, along with Yamaha's SFG-05. If you have ever heard the DX100's famous "Solid Bass" patch anchoring a house record, you have heard this chip.

OPZ (YM2414) is arguably the most musically rewarding of the group. It powered the legendary TX81Z and the DX11, and unlike its predecessors it offered eight synthesis channels, eight selectable operator waveforms, a fixed-frequency mode, and dual LFOs. Those extra waveforms are why the TX81Z can produce metallic, vocal, and downright ugly tones that a stock DX7 cannot.

OPZII (YM2424) appeared only in the Yamaha V50 workstation, adding more polyphony than the TX81Z along with 0 Hz operators.

Bundling all four into one plugin puts a substantial slice of Yamaha's history behind a single interface — and there is a genuine gap in the market here, since well-emulated four-operator Yamaha instruments are thin on the ground. On iOS and macOS, KQ-Tixie covers similar territory.

Why 4-Op FM and Expressive Control Get Along

There is a reason FM keeps resurfacing in conversations about expressive playing. In FM synthesis, the parameter that controls brightness is the same parameter that controls harmonic content — push modulation index and the timbre does not just get louder or brighter, it changes character entirely, moving from hollow to metallic to clangorous.

That makes modulation index an unusually good destination for a continuous expression dimension. On the original hardware, players had aftertouch and a mod wheel to reach it. On a modern controller with per-note pressure or a timbre axis, each note in a chord can sit at a different point in that harmonic space simultaneously — something no four-operator hardware from 1987 could do.

The four-operator chips are particularly well suited to this because their architectures are small enough to hear clearly. With six operators and 32 algorithms, it can be hard to tell what a given modulation is doing. With four operators and eight algorithms, the relationship between gesture and result stays legible.

The Honest Caveat

Plogue has not stated whether Chipsynth OPMZ will support MPE. The teaser covers the chip emulations and nothing else. Plogue's existing chipsynth line is built around faithful hardware emulation rather than modern per-note expression, so it would be premature to assume MPE is part of the plan.

That is a reasonable question to raise with the developer while the instrument is still in development, and Plogue has historically been responsive to its user base. Faithful chip emulation and per-note control are not in conflict — the chips themselves have no opinion about how many MIDI channels feed them.

What We Know About Availability

Plogue Chipsynth OPMZ is described as coming soon. No price, release date, or format list has been announced. Plogue's existing chipsynth plugins run as VST, VST3, AU, and AAX on macOS and Windows, so the same coverage is a reasonable expectation.

For anyone who wants a preview of the developer's approach, the earlier chipsynth PortaFM, which models the Yamaha PSS consumer keyboards, gives a fair sense of how deep Viens goes on hardware detail — down to modelling the DAC quirks and aliasing artifacts that give these chips their grit.

Worth Watching

Vintage digital hardware from this period has an obvious limitation and an obvious opportunity. The limitation is that these machines were built with a handful of expression pathways. The opportunity is that a plugin recreating them has no such constraint.

Whether OPMZ takes that opportunity remains to be seen. Either way, having OPM, OPP, OPZ, and OPZII accurately modelled in one place is a useful thing to exist.