Filters are applied separately to each voice element, rather than to all simultaneously. In voice mode, push [EDIT], then select which element you want to examine by using the 1-4 buttons (these double as the first four track select buttons). Push [F3]. This takes you to the filter pages. TYPE (button [SF1]) is where the filter type is listed. You can still use the 1-4 buttons to select which element you want to use.