it aint a electronic piano.
Yes, it ain't.
It's a thing with lots of nobs and switches, which are used to create synthesis.
Using a white noise generator and wave tables.
Some have a keyboard built in, others are rack units which you play via MIDI from a mother keyboard.
Some of them, yes, but they do not only use white noise.
In fact, most Synthies just use an oscillator (or more) which generate an electric impulse, that can be shaped with various types of oscillations. For example, the most known and mainly for the typical club-bass-sound used shape is a pure sine.
YOu might know that one from the Physics-classes.
It sounds kinda 'round' and full and mostly warm.
Other wave-shapes are saw, triangle, s&h (which stands for sample & hold, it's mostly used for LFO's (Low Frequency Oscillators)) and s&g (sample & glide, also mostly LFO).
More common wave-table synthies are also named Romplers, as they mostly play a preset-sound from their rom.
Liam has loads of it, but he alters the presets quite a lot, so no one can 'discover' the presets.
If you wanna know more a bout synthesizers and how you use them, you're welcome to ask, I've gotta shut now.