The Analog Four is a sophisticated 4-voice polyphonic synthesizer, and a flaghsip product of Swedish company Elektron. Yes, it's pretty expensive.
What does it offer? In summary:
- Great analog sound and effects (chorus, delay, reverb.)
- Extensive substractive synthesis options (too many LFOs to list them.)
- Deep sequencing possibilities (parameter locks, polyrhythms, conditional triggers...)
- Live-oriented features (performance macros.)
Elektron users usually call it the A4. It is one third of the Dark Trinity.
I can't really go in details about this machine for now, since I barely had time to use it yet. But I absolutely love it so far. It looks, feels and sounds fantastic.
I got an Analog Four MKII one month after acquiring an Analog Rytm. As expected, they are the two halves of a greater whole.