- What type of keyboard (piano synth ...)? How many octaves? :

Analog synthesizer modlisation 3 octaves.
MIDI IN, OUT, THROUGH. 6 out, 2 in, pedal and hold ctrl, headphone jack.
- The expression is good? (Raction VLOC the aftertouch)?
Excellent!

- Controller What (pitch, modulation, sustain ...)? :
The rpart contrl are in 7 panels.

1/Effets: dist, alpha, echo and delay / reverb in series.

2/Arp: 64 patterns with Different.

3/LFO/MOD: Modulation Matrix.

4/Oscillateur: 3 Osc (shape, select wav, semitone, detune 2 / 3)

5/Mix: osc ball, sub osc, osc theft, noise, ring mode)

6/Filters: 2 filters (cutoff, res, Env Amount, Balance filter) 4 types (lp, hp, bp, bs) + (attack, decay, substain, release), they allow the sound sculp.
MOOG filter for this version (exceptional)

7/Amplifier: Attack, Decay, substain, Release

Each panel is Entirely paramtable via an "edit" button

UTILIZATION

Very easy to use
Editing sounds mtriser ... but comes very quickly!
No manual ... but really do not need

SOUNDS

Must listen ... you going to love it!

OVERALL OPINION

Sounds you pter forums ... taste it, it can no longer do without.
It is well worth its price!
I tried almost all brands (supernova2 Novation, Moog Voyager, Korg ...) but I never heard such sounds. I'll invest in a TI2 polar (but not given adchire)
With exprience, recess, I do it again this choice (ACCESS, a virus that can not heal)