The Poly Evolver Keyboard is a four-voice analog/digital synth designed by Dave Smith(founder and President of Sequential Circuits). One look shows it classic lines: 5-octave keyboard, pitch and mod wheels, and a ton of knobs and switches in a clean, clear layout. Each voice has two analog oscillators, and two digital oscillators.

MPN: DSI-2014

Specifications (Each of the 4 voices feature)

Four oscillators in total: two analog, two digital
Analog Oscillator waveshape are Sawtooth, Triangle, Saw-Triangle, and Pulse (with voltage-controlled analog Pulse-Width modulation)
Digital Oscillators select from 96 wavetables from the Prophet-VS (128 x 12 bits), and 32 user-loadable (via MIDI) Wavetables (128 x 16 bits). The Digital Oscillators get trashy as the frequency gets higher, as with the original VS.
Hard Sync on the analog oscillators
FM and Ring Mod on the digital oscillators
Separate Glide per oscillator, with two glide modes
Real voltage-controlled analog lowpass filters - not digital recreations. 4-pole/2-pole switchable, fully resonant (in 4-pole mode). There are two separate filters, one for the left channel and one for the right.
Analog Voltage Controlled Amplifiers (VCA), again one for each channel.
Dual digital 4-pole Highpass filters (one per channel); place before or after analog electronics.