GAR allows you to create and analyse geophone arrays quickly and easily on your PC. You can look at the reponse from any angle and evaluate responses for a given frequency or velocity, saving you from having to convert to Arraylength/Lambda.
Currently no instructions are included, but some sample design files are. Just go to the Design Panel and click 'Open File' .To delete a point in the design panel, right click on it.
Sometimes 'Snap' must be off for this to work.