midilib (http://midilib.rubyforge.org) is a pure Ruby MIDI library useful for reading and writing standard MIDI files and manipulating MIDI event data. Classes include MIDI::Sequence, MIDI::Track, MIDI::Event, and MIDI::IO::MIDIFile and its subclasses MIDI::IO::SeqReader and MIDI::IO::SeqWriter.

* Realtime status bytes now set @is_realtime to true and return true when realtime? is called.

* All system common events now set @is_system to true and return true when system? is called, not just system exclusive events.

* Added examples/from_scratch.rb, which shows how to create a sequence manually.

* New MIDI::Sequence methods that turn note length names like "32nd", "dotted quarter", and "16th triplet" into delta times. See the docs below and MIDI::Sequence::length_to_delta, MIDI::Sequence::note_to_length, and MIDI::Sequence::note_to_delta.