add Optoproductions drum tutorial to manual

README.md

@@ -245,6 +245,7 @@ The RouteMaster modules are designed to work with PatchMaster (although they can
 * Artem Leonov, [Mixing mini patches in VCV RACK with new MINDMELD EQMASTER module](https://www.youtube.com/watch?v=wW1UREZQQXU)
 * Jakub Ciupinski, ShapeMaster [Ep.1-Intro](https://www.youtube.com/watch?v=dq87VzR-37I), [Ep.2-LFO](https://www.youtube.com/watch?v=rI9GSK90Tio), [Ep.3-Sequencer](https://www.youtube.com/watch?v=X92K5c9NAh4), [Ep.4-Random](https://www.youtube.com/watch?v=x-azB2iyjfY), [Ep.5-Time/Groove shaping](https://www.youtube.com/watch?v=m7XY0v_hSAE), [Ep.6-Multifunctions](https://www.youtube.com/watch?v=1bWlMzLIYAg), [Ep.7-PhaseSeq](https://www.youtube.com/watch?v=Ue7blVMOKL0), [Ep.8-Playheads](https://www.youtube.com/watch?v=zL3qVTyhntM)
 * Jakub Ciupinski, [ShapeTracker for ShapeMaster Pro](https://www.youtube.com/watch?v=s1WLeTJpf8Y)
+* Optoproductions, [Mindmeld Shapemaster Drums](https://www.youtube.com/watch?v=yDX-21E2Lvk)
 
 ### In the wild
 * Wouter Spekkink, [Street lights](https://www.youtube.com/watch?v=QpDp3RGGcBg)