Vintage Blue Monster DIY Analog Modular Synth

via this auction

"The modules in the upper cabinet:
Noise, 1x processor, multiple, CV-gate output, 3x VCO, 2x VCF, VCA 2x, 2x CV Processor, 3x DADSR, external input, Output Module

The modules in the central cabinet:
Frequency shifter, 1x AR (ENV), multi-VCF (partially functional), 16-step sequencer, flanger without board with controls so no function, Phaser (phaser similar sound comes out, otherwise not fully tested), Filter bank, 3 x ADSR, LFO, mixer

The modules in the lower cabinet:
Digital Counter, Memory, Logic Modules 5-octave keyboard, unfortunately, without proper function."