Analog synth from the early 80s (late 70) 5 Octaves
3 major types of sound (Organ, String, Poly-synth)
Complete connectivity: Headphone, pedal sustain, possible connection of two volume pedals
(1 dedicated to the "string" and the other dedicated to the mixing of three sounds)
An output amplifier for the sound "poly-synth"
An output amplifier for the sound "Organ"
An output amplifier for the sound mix 3
1 amp output for connection to 11-pin Leslie
No connection possible by noon or USB, is pure vintage analog
1 knob overall volume coupled to a switch to disable the amplifier output to the headset to work without having to disconnect
Part "Organ", and "string"
3 types of preset sounds available with 3 buttons (organ)
A button to manually edit its activating drawbars Harome (organ)
Two types of preset sounds available with 2 buttons (string)
1 knob on the left of the keyboard can change the volume
To effect a pitch up or down slightly tone notes
A vibrato effect with volume settings, delay, speed.
7 harmonic drawbars (organ only)
1 knob sustain adjustment (can be disabled)
knob a feast of decay (can be disabled)
A chorus type effect button (not configurable)
A Leslie type effect button
1 button speed of the effect very realistic since the acceleration and deceleration of the drums is well marked. we believe it.

Possibility of splitting the keyboard into two (string on one side and the other organ)

Party "Poly-Synth"
3 types of preset sounds available with 3 buttons
1 button manual editing of the activating effects of zippers to change the sounds using filters and oscillators

An almost infinite combination of sounds because you can mix the three types of sounds thanks to the volume pots on the left of the keyboard

UTILIZATION

There is no easier
Has made to the "Poly Synth" or it is a long hack to get good sound
I did not have the manual with the keyboard (Occaz) but I downloaded from the net in English
But it is not really necessary

SOUNDS

The sound is of the Hammond Organ
The effect Leslie makes it easy to get close to a sound type Deep Purple or Pink Floyd
There is unfortunately not the saturation of the sound that would have the same sound on Space Truckin 'Smoke on the water or
There is no velocity, the keys are simple and are as a synth (not heavy)
String sound allows a sound similar to Genesis (Turn It On Again, home by the see)
I do not like the sound Poly Synth, because I have not really found its usefulness
The settings are not necessarily easy to master this part of the synth
Its weakness is that he is for his play ground
It is not famous solo
I had the opportunity to play in a group with this keyboard and it is imperative to get the sound of the amp or keyboard to play solo
In addition Leslie effect significantly increases the sound of keyboard
https://www.dailymotion.com/manurichez
/ \ The keyboard on the video is not the SK20

OVERALL OPINION

I was looking for a Hammond-style keyboard or Rhodes
I bought this synth on a whim via an ad on the net and 350 Euros
The salesman was friendly and knew how to sell his product ...
I love the vintage Hammond and his side (wooden frame, over scrap metal)
Weight of 15 kg is quite impressive to see annoying but at least it's solid.