Korg TX81Z

Name: Korg TX81Z
Brand: Korg

A Korg-badged FM module that turns out to be one of the more confusing pieces of gear in the archive. The paper trail says so.

Overview

First, a correction: the Korg TX81Z is not a Korg product. Every period source in the archive that names this unit attributes it to Yamaha. The TX81Z was Yamaha's 4-operator FM tone module, and it shows up in contemporary rig rundowns as a Yamaha, not a Korg. This page exists because the archive's catalog lists it under Korg, and the honest move is to flag the discrepancy rather than paper over it.

The period documents do show that the TX81Z was a working module, not a collector's curio. In a writeup on digital wind controllers, saxophonist Ernie Watts described touring large venues with a rack built around a Yamaha TX81Z alongside a TX802, an SPX90 and an MFC2. He also noted that a WX11 wind controller paired with a WT11 tone generator contained, internally, the equivalent of a TX81Z and an SPX90 - small enough to carry onto a commercial flight as hand baggage. So the TX81Z was common enough in working rigs that Yamaha folded its voice architecture into a portable tone generator. Steve Tavaglione, preparing for a Diana Ross world tour, ran a TX81Z in a MIDI rig alongside two Akai S950 samplers, a Korg M1R, an Oberheim Matrix 6 and a Roland D50, all driven from an Akai EWV 2000 wind controller.

Session players used it too. Mike Lang, a busy Los Angeles keyboard player with television credits on "Knots Landing," "Dallas," "A Fine Romance," "Jake and the Fat Man" and "McGyver," listed a TX81Z among a stable that included two Yamaha DX-7s, a DX-7FD, a Roland D-50, a Jupiter 8, an MKS50, a Super Jupiter, an MKS 80, an MKS 20, a Korg M1, an Oberheim Matrix 12, an E-mu Emulator II and a Prophet VS. The TX81Z was one voice among many in that list, not a centerpiece, but a module players reached for when they wanted a specific FM character. Lang's stated approach was to pick instruments for unique character, assembling an orchestra of different points of view. The TX81Z earned a slot on that basis.

The module also attracted third-party software, which is often a better sign of real-world adoption than any spec sheet. Bacchus Software Systems sold a TX81Z graphic editing system at a suggested retail of $199.95. It was a voicing tool for creating, storing and retrieving sounds, with mouse-based editing, icons, graphic control panels and multiple overlapping windows. Digital Music Services released TX81Z PRO 2.0 for the Macintosh, an editor/librarian with faster running times, MIDI echo options, new multiple selection features, on-screen graphic envelopes and an expanded utility editor. The TX81Z had enough installed base to justify dedicated commercial software at a price approaching what the hardware itself traded for used.

And trade it did. A 1991 classified listing from Rogue Music, billed as the world's largest dealer in used musical and recording gear, quoted a typical used price of $319.00 for a Yamaha TX81Z, against $199.00 for an FB-01, $625.00 for a DX7, $1,050.00 for a DX7IIFD and $299.00 for a TX7. By the mid-1990s, UK private-sale listings had pushed it lower. A 1996 ad offered a TX81Z FM expander, described as multitimbral with "great sounds," at £130 or near offer, and a 1996 listing paired a TX81Z at £180 with a Roland MKS20 and an R100 at £95. Audio-Collection (April 1991, p.149) printed the Rogue Music price list, and Sound-on-Sound-UK (April 1996, p.205) carried the £130 private-sale ad.

The TX81Z was a rack module that showed up in touring racks, home MIDI studios and television session work through the late 1980s and into the 1990s, supported by a small industry of editor/librarian software. By the time the classifieds caught up with it, it was a £130 impulse buy. The archive's own fact sheet for this model is empty - no specifications, no dates, no design details were extracted - so this page makes no claims about voice count, operator architecture, converters, dimensions or production years.

What can be said with confidence is narrower. The TX81Z was a Yamaha module that Korg's catalog here has misfiled, it was a working tool rather than a trophy, and its secondhand value settled in the low hundreds of dollars by the early 1990s and lower still by the middle of the decade. Anyone buying one today should treat the brand attribution on this page as an open question and go by the badge on the back of the unit.