The Suiseki is Old Crow's 4HP eurorack version of the famous Small Stone phase shifter from the mid-1970s. From Pink Floyd to Jean-Michel Jarre, this is the sound of those string pads of days gone by. The Suiseki uses a common part list, replacing the CA3094s in favor of widely available LM13600 or LM13700 ICs. The front panel is black FR-4 material and mounts nicely in just about any cabinet or skiff. Note: this is a bare-board set.
Build doc for Suiseki board and panel.
Audio demo using a Jan Ostmann string tone generator as the audio source.