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Yamaha DX7IIFD Digital Programmable Algorithm Synthesizer

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Description
Three improved "DX7 II" models were released between 1987 and 1989, all of which featured updated internal circuitry and a restyled case. These were the DX7 IID, which improved sound quality from 12-bit to 16-bit, increased the internal patch memory and allowed bi-timbrality; the DX7 IIFD, which was identical to the DX7 IID except that it also had a floppy disk drive; and the DX7S, which had improved sound quality and the updated case, but otherwise had the same essential functionality of the original DX7 and in that sense, was its true successor. Third-party products for the DX7 also flourished in the 1980s, including Grey Matter Response's E! expansion board, which added sequencer functions to the DX7II keyboard, and increased patch memory and a vastly improved MIDI implementation in the original DX7. DX7 IIs could transmit and receive on any one of 16 MIDI channels at a time. The DX7 family remains popular to this day with many recording and performing artists.

The upgrade to 16-bit digital-to-analog converters helped to solve one of the original DX7's shortcomings: noisy output. The instrument's 12-bit DAC's generated a fair amount of hiss, and some users would put a noise gate in its signal path to quiet the unit when it wasn't playing.

Yamaha wisely designed the DX7 II series so that voices produced on the original DX7 were 100% compatible with the new "II" models, which allowed users to immediately experience improved sound quality from existing DX7 patches via the increased resolution and fidelity of the new 16-bit system. Further, this meant that DX7 II owners had access to a vast base of thousands of existing DX7 sounds, which amounted to a major selling point for the new units.

In 1988, in celebration of the company's 100-year anniversary, Yamaha released the DX7 II Centennial. It was a DX7 II FD with a silver case, gold painted buttons and sliders, and 76 glow-in-the-dark keys. Only 100 were made and they were priced at US$3995.

Features

Dual and Split Mode

In Dual and Split Modes, two different voices can be played in unison or on separate parts of the keyboard and output in stereo.
Stereo Effects

The Pan parameters not only let the user determine the position of voices in the stereo field according to key touch or when part of the keyboard is played, but also create various special effects such as automatic panning between left and right channels.
Fractional Scaling

Operator output level Scaling can now be programmed individually for each group of three keys, giving the user natural keyboard control over timbre and volume.
Micro Tuning

Micro Tuning gives the user the possibility of "tempering" the instruments in any conceivable way. Preset tuning variations include Equal, Pure (C major, A minor) and Mean Tone temperaments.
Unison Key Modes

In the Unison (mono and poly) Modes, 4 sound generation units are assigned to each key. These can be detuned to achieve a "fat" sound.
Pitch Bend

Pitch Bend can be programmed so as to affect only the lowest or highest note of a chord, or notes played, but not their sustained sound. In addition, pitch bend effects can be controlled by aftertouch or breath controller.
Performance Memories

Save favorite voice combinations along with pan and various control settings in special "Performance" memory.
Glissando Pitch

With the Portamento Step parameter, Glissando Pitch stepping can be regulated from 1 semitone to 1 octave.
Storage of Voices and Performance Data Groups

Store 64 voices and 32 "Performance Data Groups" each in the internal memory and optional RAM cartridge memories for hundreds of voice combinations.
Low Frequency Oscillators (LFO)

The DX7IID has 16 Low Frequency Oscillators (LFO), one for each voice. In the multiple trigger mode, a totally independent LFO cycle can be started for each note played, making ensemble vibrato and tremolo more realistic.
Disk Drive as MIDI Date Recorder

Besides offering 1 Mbyte of memory space (equal to 40 RAM cartridges) for thousands of voices, fractional scaling and other data, the built-in micro floppy disk drive can store data from other MIDI equipment.
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Technical Specifications
Type: Digital
Synthesis: Frequency Modulation
Oscillators: 6
Waveforms: Sine
Envelopes
Envelopes: 6
Evelope Paramerters: Rate 1, Level 1, Rate 2, Level 2, Rate 3, Level 3, Rate 4, Level 4
Filters
Filters: 0
LFO
LFO: 1
LFO Parameters: Sample & Hold, Saw Up, Sine, Square, Delay, Key Sync
Polyphony & Tuning
Polyphony: 16
Timbrality: 2
Patches
Patches RAM: 256
Patches ROM: 512
Storage: Tape, Internal, RAM Cartridge, ROM Cartridge
Editing: MIDI
Arpeggiator
E! option added multi-mode Arps
Sequencer
E! 8-channel sequencing up to 20,000 notes.
Case
Case: Keyboard
Case Details: 61 semi-weighted keys
Controls: Aftertouch, Breath, Velocity, Mod - Wheel, Pitch -Wheel, Pedal - Sustain, Pedal - Volume
Display Notes: LCD: 40 x 2, Backlit, LED 2 x 1
Dimensions (WxDxH): 999(w) x 85.8(h) x 333.7(d) mm
Weight: 11.2 kg
Connections
Audio Output Connections: 1/4" Phone Jack, Stereo Main, Stereo Headphone
Audio Output Count: 4
MIDI Ports: IN, OUT, THRU
DAC Bits: 15
DAC Frequency Rate: 44.1
Power: 120 V 7 watts, 50/60 Hz North America / 220 - 240 V, 50 Hz Europe
Production
Year Released: 1987
Year Discontinued: 1989
Used By
Brian Eno, Klaus Schulze, Tangerine Dream, Michael Brook,
Manuals & Documents

Product Links
Company Product Sites:
[+] en.wikipedia.org
Pricing
MSRP List Price: $2495 - convert
Retail Street Price: $2300 - convert
Used Price: $200 - $500 - convert
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References & Sources

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