sequencer
    n 1: (chemistry) an apparatus that can determine the sequence of
         monomers in a polymer [syn: sequencer, sequenator]
    2: computer hardware that sorts data or programs into a
       predetermined sequence

sequencer

    Any system for recording and/or playback of music via
   a programmable memory which stores music not as audio data,
   but as some representation of notes.  The most common modern
   usage of "sequencer" is to refer to systems (whether in
   software, or as a feature of devices like synthesizers or drum
   machines) that deal with MIDI data.

   (1999-06-04)