AKAI ANALOG SYNTH VX90

via this auction
"The VX90 is the rack version of the AX73. It has MIDI split capability, 100 memory slots, and accomodates equipped AKAI SAMPLERS for creating totally new sounds by editing sampler data or mixing samples with the ANALOG internal sources. (Includes AKAI S-61, S-900, S-950 samplers.) Samples can be processed through the VX90's analog filters and envelopes."

"SIX FULLY CONTROLLABLE ANALOG OSCILLATORS... TWO FULLY ANALOG FILTERS, one is 24dB/Oct 4-pole (capable of cutting much deeper than most filters) and has a rare feature allowing the cutoff to be modulated by the VCO."