In essence, the Split Poly plugin strips a chordal passage into individual single-line melodies on separate midi channels. You could use this plug-in, for example, to transform a polyphone sax or trumpet section into single-line melodies:
Basically there are two splitting modes. “Track Split” splits note events that are recorded and already reside on a track. In contrast “Live Split” splits notes that are played live. These events come directly from the midi input device.
There are several options which allow a detailed control of the plug-in behaviour.
Split Type specifies the algorithm that will be used for splitting.
You can further control the non-note handling of all other remaining events (controller, aftertouch, patch changes, pitch wheel, etc. events). For example, if there is a volume change before a chordal passage that has to be split, what should be done with volume change: Leave non-note data unchanged, Duplicate non-note data, Delete non-note data, Set to specific midi channel.
Channel Filter offers an easy way to filter out events on single channels. Each channel that is checked will simply pass thru. Channels that are unchecked will be discarded. In the example on the right, events on channels one to eight will pass thru and events on channels nine to sixteen will be filtered.
Temporary Quantization performs a quantization with the given resolution before the splitting starts. After the splitting, the quantization is undone so that you effectively will never notice any changes in the event’s timing. This option is very helpful if the notes of a chord do not exactly start at the same time, although the notes are supposed to form a chord.