Yamaha DX7s/IID/IIFD

A classic synth gets a make-over by three significant updates to the original. The DX-7 was an amazing digital FM synth. The DX-7s carries on the torch once held by the DX-7. It offers the same great FM synthesis method and can also create sounds just as unique and wild as the DX-7. However, they can be just as difficult to program and understand for most users. Some general improvements include enhanced MIDI support, micro-tuning, aftertouch controlled pitch bending, and multiple LFOs. Although many improvements have been made to the DX-7 in this upgrade there still could have been room for improvement, which is where the DX7IID and DX7IIFD come in.

These next models allowed for keyboard split and layering capabilities. The DX7IID (pictured above) and DX7IIFD hold 64 voices in internal memory, as well as an additional 64 voices in a RAM/ROM cartridge that can be accessed. These voices can be layered in dual mode providing very rich sounds or a nice combination of sounds that would be impossible on the original DX7. They can also be split, for a two voice multi-timbral capability. Again, impossible on the original DX.

They have wonderfully clean sound and are stereo, providing pans and chorus and a few other nice effects. There are two real time sliders on these instruments, allowing control of user-programmable items in real time. Micro-tuning, as well as fractional tunings for eastern music etc. is possible. The FD includes a floppy drive for storage of patches, performance presets and sysex information. Like the DX7, these new models may have been used by The Crystal Method, Kraftwerk, Underworld, Orbital, Talking Heads, Brian Eno, Depeche Mode, D:Ream, Front 242, U2, A-Ha, Enya, The Cure, Stabbing Westward.

Pictured in silver & gold above is the DX-7 Centenniel, released in 1988 to celebrate Yamaha's 100th anniversary. Not just a new paint job, the limited edition model had 64-voice internal RAM memory and 64-performance memory, 32-note polyphonic stereo output (2 x 16 voices), and a 76-key velocity and after-touch sensitive keyboard that glows in the dark. Additional improvements include enhanced MIDI support, stereo panning, 6 envelope generators and enhanced 16-bit circuitry. Only about 300 were made and it originally sold for $4,000!

Specifications
Polyphony - 16 voices
Oscillators - Programmable 6-operator x 2 (A & B) 32-algorithm digital FM tone generator
LFO - Sine/Square/Tri/SAW up/SAW Down/Random
Filter - None
VCA - 6 Envelope generators 8 parameters each
Keyboard - 61 keys, Velocity and Aftertouch, Split and Layer mode
Memory - 128 patches, 32 performances
Control - MIDI IN/OUT/THRU
Date Produced - 1987
Est. Value - $350 and up