The Analog Keys is very much a sister product to the Elektron Analog Four synthesizer/sequencer. The signal path from the oscillators to the audio outputs is completely analogue, and the external inputs can be routed in right at the start of the chain. However, the noise generator, envelopes and LFOs are all digitally generated.
The learning curve to get the most of the Analog Keys hardware is quite steep in places. While there are many areas of apparent creative freedom and flexibility, there are other aspects that frustrate.
However, there's plenty to like about the Analog Keys. It has a fine synth engine under the hood, some interesting interfacing options, and is capable of some great results in sonic terms.4 Stars
Read Elektron Analog Keys review