-e Evaluate the effect this has on the number of pitch directions.
-f Filter the file, removing drums (before doing anything else). This uses the 'adhoc' classifier, which assumes a GM-compatible file.
n Quantise on nths of a note. Defaults to 32. This will detect the best interval if n == 'b'. Note that a value of zero will perform quantisation but will not modify timing.
-s Perform a higher quality quantisation (quantises note start + length).