This is just demo testing the second synthesizer i built for someone ,it contains a doepfer pcb board ,additional MFOS VCO ,Yusynth Sample and Hold ,MFOS Noise ,Suboctave ,MS20 XOR ,Glitchy Steiner VCF (my first proper pcb i built) ,Analog Neuron , the little black/white box is an external PSU with +/- 15 V ,+/- 12 V ,9V / Ground ,all could have been done better):