Please try SAS-4As ahead of that if you will buy a genuine analog synthesizer.
SAS-4AsLite is a subset version of SAS-4As.
Please buy SAS-4As after confirming this operates by your iphone and iPad touch if you buy SAS-4As.
This is a simulation of a basic function of an analog synthesizer.
2-Oscillator 24db/oct-LowPassFilter ADSR-EnvelopeGenerator LFO with S&H PitchBender
You can see the manual by touching the "MANUAL"switch.