Solton K160
Solton K160 is a 61-key keyboard released around 1988[1] by Solton, an Italian keyboard/organ manufacturer. It's a hybrid analog-digital synthesizer with waves composed of short PCM samples (sometimes even multisamples) and analog filters, but with limited editability - the only editable parameters of the engine itself are filter cutoff, resonance and filter EG amount. It has 128 presets organized in 4 banks of 32. These presets can then be edited and combined (layered/split) as part of the 32 "programs".
Patch structure
There are 128 presets, organized in 4 banks of 32. These banks can be accessed through pressing the "Preset Bank" button - a LED will light corresponding to the bank that's currently selected. Individual instruments can then be accessed using the 32 buttons to the right. If one wishes to edit the sounds, they have to switch to Program mode using the button named "Program" - a LED will then light up, then select a program, of which there are 32, using the same 32 buttons one'd use to select presets, and press the Edit button. There are 19 parameters, corresponding to the first 19 buttons.