Level features, soft touch keyboard 61 notes, polyphonic aftertouch.
Internal memory of 64 sounds "simple" and 32 performances (combination of two sounds). Ram4 cartridge slot (very hard to find).
Compared to the first DX7, it is bitimbrale. It can transmit on two different MIDI channel. It can therefore be stacked or split two sounds. The DX7 IID and IIFD are identical, only difference the floppy disk drive 3 "on fd 5 (floppydisk).
The dx7S is itself an updated version of the first DX7 (monotimbral).

UTILIZATION

The config is very simple
The edition on the other hand is a bit more complicated, it takes some getting used to.
As for the programming of sounds, it's making big head, unless you are an engineer specializing in FM synthesis.
The original manual is very well done, and is also a large PTT Botin.

SOUNDS

The sounds are absolutely fabulous. It's a synth legend who knows almost everything.
on the other hand, no effects, no sequencer, no gadgets, it's hardcore!
Very good: Rhodes-style electric pianos wurli
- Style electro bass
- Groundwater style analog
The good: everything else

The not so good:-acoustic pianos
- The kind guitar
All good albums he's 80/90 years! (Level 42, Goldman, etc ...)

OVERALL OPINION

I bought new in 1988. At the time it was expensive (14,000 f)
I love it, I keep, I worship him .......