Bio2Midi converts the text of a DNA or protein sequence to a MIDI file, which you may immediately audition, or import into any MIDI sequencer for further compositional processing. Choose to listen to the sequences as 4-note DNA bases, or as 20-note protein amino acids, or both at once. You can select specific data sections to be translated, called exons and introns, and mark areas of interest to be played in a different instrument.