Piano roll Chopper

The Piano roll Chopper is an advanced note slicing tool that can use standard score files as slicing templates.



The Piano roll Chopper uses standard FL Studio Score files (*.fsc) as slice patterns . Click the Browse button to select a groove template. The Piano roll shows real-time preview of the results. See below for some guides about making such patterns.


This section lets you set the options that will be used for slicing.

  • Time Multiplier knob - With this setting you can speed up (turn left) or slow down (turn right) the pattern tempo. The chopper uses the original pattern speed by default.
  • Levels knobs - With these controls you can mix the original note properties (turn left) with those used in the chop pattern (turn right).
  • Absolute Pattern switch - On: slicing is based on the Piano roll grid. Off: Each note is sliced relative to its own start time (see the example image below).
  • Group notes - Groups chopped notes (that is horizontal grouping of the original notes chopped pieces).

Action buttons

  • Reset - Reset the tool to the default state.
  • Accept - Accept changes and close the tool. Note, these changes can be subsequently undone using the Current project History or Ctrl+Z.

Guide for making Chop / Arpeggiator patterns

Chopper and Arpeggiator patterns are regular Piano roll scores, but are interpreted in a special way to fit the purposes of the Chopper and Arpeggiator tools. Templates can be found in the FL Studio installation folder under ..\Data\Patches\Scores\Arpeggiator or if you select the Piano roll menu > File > Open score, this should open in the Scores folder.

  • Colors - The first 4 colors in the selector are used in chopper/arp scores.

    1 (Green) - The boundary of green notes defines the chopping pattern while the position relative to C5 the transposition. For Chopper scores all notes should be placed on C5, this instructs the Chop tool that all notes of the original score should remain at their original pitch. For Arpeggiator scores, source notes will be Arpeggiated relative to the interval between C5 and the notes set, For example, C5 = no pitch change, F5 = +5 semitone transpose and A4 = -3 semi-tone transpose. So if the source note in the original Piano roll was B4 and the Arpeggiator score was at F5 for the overlapping portion of the source and arpeggiator score, then the B4 would be transposed to D (+5 semitones).

    5 (Blue) - Defines a note that will not be chopped.

    9 (Pink) - Pink notes are not affected by the octaves range set in the dialog

    13 (Yellow)- Defines the length of the pattern, useful when the chop/arp pattern does not extend to the end of the bar.

  • The start of the score matches start of the processed score in absolute pattern mode, and start of each individual note in relative pattern mode (absolute mode off).