Yamaha DX7

About the Yamaha DX7

At its core, the DX7 runs six digital sine-wave operators per voice, wired together through one of 32 fixed algorithms that decide which operators act as audible carriers and which act as modulators shaping those carriers' frequencies - the algorithm diagrams are printed right on the instrument's case so players don't have to memorize the routing. There's no filter and no built-in effects; all of the instrument's color comes from how those six operators interact. Yamaha backed that sound engine with genuine firsts for a synthesizer: a liquid-crystal display for programming feedback, full velocity sensitivity and aftertouch across a 61-note keyboard, and MIDI in/out/thru at a moment when that protocol was brand new. Getting there took serious engineering compression - the 1980 GS1, Yamaha's first FM synth, needed fifty separate chips to do what the DX7 does with two custom chips (the YM2128 operator chip and YM2129 envelope generator), a leap that is the real reason the DX7 could sell at a price ordinary musicians could afford rather than staying a studio-only curiosity.

Where to buy

• eBay YAMAHA DX7 FM Synthesizer 61-Tasten Digital Keyboard MIDI frühes Modell getestet 593 EUR Best price View details
• eBay Yamaha DX7 61-Key Digital FM Synthesizer Keyboard Vintage Japan A14 Japan 635 EUR View details
• eBay Yamaha DX7 61-Key Digital FM Synthesizer Keyboard Vintage Japan A14 Japan 635 EUR View details
• eBay YAMAHA DX7 Digital Synthesizer Vintage FM Synth Keyboard Japan getestet 772 EUR View details
• eBay YAMAHA DX7 II FD FM Synthesizer 1986 Digital Keyboard in perfekten Zustand 832 EUR View details
• eBay YAMAHA DX7 Digital FM Synthesizer 61-Tasten 16-stimmig 1983 Vintage gebraucht 1.037 EUR View details
• eBay YAMAHA DX7 Digital FM Synthesizer 61-Tasten 16-stimmig 1983 Vintage gebraucht 1.037 EUR View details

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Sound character of the Yamaha DX7

Compared to the warmth typically associated with analog oscillators, the DX7 produces a sound widely described as harsh, glassy and chilly - spiky, crystalline textures rather than rounded ones, a direct consequence of building tones from pure sine-wave operators rather than filtered sawtooth or pulse waves. That character turned into a genuine strength for certain sounds: the instrument's bell and metallophone tones are considered uncannily accurate, and its fast digital envelopes give percussive sounds like marimba a crisp, well-defined attack. Its range runs from the famously sweet, chiming electric-piano and string patches that defined 1980s ballads to cutting leads, fat basses and ethereal pads, all sitting on a bed of audible background noise characteristic of early digital-to-analog conversion.

What owners of the Yamaha DX7 say

Long after its commercial heyday, owners still rate the DX7 highly for exactly the qualities that outlasted the FM-synthesis fad: one longtime player sums it up simply as 'still great synths, the keybeds are really nice to play.' Reliability draws particular praise in long-term retrospectives - unlike many analog synths of the same era, most surviving DX7 units are reported to work flawlessly even after decades sitting unused, a point repeatedly credited to the robustness of its digital circuitry over analog components prone to drifting or failing in storage. Given how many units Yamaha originally sold, the instrument is also widely noted as unusually affordable on the used market relative to its historical importance.

Playability & handling of the Yamaha DX7

Programming the DX7 through its two-line display is widely described as awkward rather than impossible - cryptic membrane buttons, unfamiliar FM vocabulary like carriers, modulators and algorithms, and a manual that explained the underlying concept poorly all added friction, and to make things worse, the first six algorithms happen to be among the most complicated to understand. That friction had a real consequence: because dialing in a custom patch from scratch was so time-consuming, most owners played the factory presets rather than programming their own sounds, which is part of why the same handful of DX7 tones turned up across so much 1980s pop and rock. None of that extends to the keybed itself, which owners still single out for feeling genuinely good to play decades later, backed by fast digital envelopes that give sounds like marimba a crisp, well-defined attack most analog synths of the era couldn't match.

Recommended accessories & strings for the Yamaha DX7

The front-panel cartridge slot takes ROM or RAM cartridges that extend storage well past the 32 built-in memory slots, which matters since factory presets alone dominated most players' use of the instrument anyway. The more pressing accessory concern on a surviving unit today is the internal backup battery, a soldered 3V lithium coin cell with a practical lifespan of roughly three to five years - losing power mid-swap is a well-documented way to scramble the synth's memory and leave buttons unresponsive, so backing up any custom sounds to a cartridge or via a MIDI SysEx dump before touching the battery is standard practice, and battery voltage itself can be checked on the display through a dedicated function command. A breath controller input also exists for players who want an additional expressive control beyond velocity and aftertouch.

Technical data for the Yamaha DX7

Price history for the Yamaha DX7

Cheapest seen: 593 EUR  ·  Most expensive seen: 1.037 EUR

The history of the Yamaha DX7

The DX7's technology traces back to Stanford researcher John Chowning, who developed frequency modulation synthesis in the 1960s and by 1971 had shown it could convincingly imitate acoustic instruments like organs and brass. Stanford patented the idea but found no takers among American manufacturers - Chowning later said Hammond's and Wurlitzer's own engineers simply didn't understand FM - until a visiting Yamaha engineer grasped the concept, in Chowning's words, within ten minutes. Yamaha's organ division began building an FM prototype with Chowning's involvement in 1973 and secured exclusive rights in 1975. Its first FM synthesizer, the 1980 GS1, needed fifty separate chips to do the job; newly developed VLSI chip technology let Yamaha shrink that down to just two custom chips for the DX7, a cost breakthrough that made mass production possible. With under four days to prepare for launch, CS-80 veterans Dave Bristow and Gary Leuenberger flew to Japan in late 1982 to program the instrument's 128 factory patches. Released in May 1983 at around $1,995, the DX7 became the first digital synthesizer to sell in serious volume - over 150,000 units ordered within a year and roughly 200,000 sold within three, dwarfing analog landmarks like the Minimoog, which took eleven years to sell about 12,000 units. It remained in production until 1989 and was followed by the desktop TX7 module, the bi-timbral but commercially weaker DX7 II, and a wider family including the TX81Z, DX1, DX11, DX21, DX27 and DX100; a stripped-down derivative of its sound chip, the YM2612, later powered the Sega Genesis. Yamaha revisited the design in 2015 with the compact Reface DX.

Notable players & recordings featuring the Yamaha DX7

The DX7's factory 'E Piano 1' preset became the defining ballad sound of its era - by one count it appeared on 40% of Billboard Hot 100 number-one singles, 40% of country chart-toppers and 60% of R&B number-ones in 1986 alone, carried by artists including Whitney Houston, Phil Collins, Luther Vandross, Celine Dion and George Michael, and later recognizable in the Twin Peaks theme and Nintendo's Super Mario 64. Its 'Bass 1' preset shaped tracks like a-ha's 'Take On Me,' Kenny Loggins' 'Danger Zone' and Kool & the Gang's 'Fresh.' Beyond those presets, the DX7 turns up in Prince's 'When Doves Cry,' Tina Turner's 'The Best,' Sade's 'Smooth Operator' and Michael Jackson's 'Smooth Criminal.' Brian Eno stood out as one of the few musicians who programmed the instrument deeply rather than relying on presets, building custom patches for his 1983 ambient album Apollo: Atmospheres and Soundtracks and later publishing his own patch techniques in Keyboard magazine in 1987. Ryuichi Sakamoto is also documented as an early adopter, using the instrument on Mari Iijima's 1983 album Rose.