Although we abstract away the issues of note harmonics and playing instrument types, we use a keyboard as input. This allows for a more rapid creation of new tunes, as well as for future real-time input. The same mechanisms used in loading the MIDI file output from the electric keyboard can also be used in loading pre-made MIDI files.
Dedric playing puts in the mood. ;o)
The input is limited to one instrument at a time, although multiple notes can be played simultaneously. The notes can be loaded by our utilities from either the MIDI0 or MIDI1 file format. The notes are separated after loading into our system into different voices.
Matching notes can be tricky, because the MIDI format stores only time ON/OFF, with a code format which can be confusing. Dedric's program successfully decodes this information and returns a Pitch/Volume/Duration/Time on encoding for each of the notes played. This encoding includes a cleaning up of slight note overlaps.
Ovidiu's code, after updating the internal MOOD note store, takes the new note and tags it with a voice. The voices denote notes which overlap, or notes which follow a pattern which is distinct from a separate set of notes being played in the same tune. This is akin to two objects which move about in space: each has a trajectory which is separate from the other object's trajectory. When doing vision, one of the first tasks is to separate potential objects based on their motion. The equivalent is being attempted here in the auditory realm.
As Manolis observes, this is yet another great MOOD success.
On to Augmenting the Input...