added logarithmic frequency scaling. this is the new default. use lin as the 3rd argument to get linear scaling.
also fixed output height argument (doesn't crash anymore :) ) NB that output height is now the 4th arg.
added logarithmic frequency scaling. this is the new default. use lin as the 3rd argument to get linear scaling.
also fixed output height argument (doesn't crash anymore :) ) NB that output height is now the 4th arg.