To interpret a MIDI message, read the status byte. The midimsg object does not support meta-events. Meta-events - Can occur in place of MIDI messages to provide metadata for MIDI files, including song title and tempo. Sysex messages - System-exclusive messages ignored by this example. To see a demonstration of this synthesizer, see Design and Play a MIDI Synthesizer. This example plays parsed MIDI messages using a simple monophonic synthesizer. NoteOff Channel: 1 Note: 60 Velocity: 0 Timestamp: 7.75 ĪllNotesOff Channel: 1 Timestamp: 8 NoteOn Channel: 1 Note: 60 Velocity: 127 Timestamp: 7.5 NoteOff Channel: 1 Note: 62 Velocity: 0 Timestamp: 7.5 NoteOn Channel: 1 Note: 62 Velocity: 127 Timestamp: 7 NoteOff Channel: 1 Note: 64 Velocity: 0 Timestamp: 7 NoteOn Channel: 1 Note: 64 Velocity: 127 Timestamp: 6.5 NoteOff Channel: 1 Note: 65 Velocity: 0 Timestamp: 6.5 NoteOn Channel: 1 Note: 65 Velocity: 127 Timestamp: 6 NoteOff Channel: 1 Note: 67 Velocity: 0 Timestamp: 5.75 NoteOn Channel: 1 Note: 67 Velocity: 127 Timestamp: 5.5 NoteOff Channel: 1 Note: 69 Velocity: 0 Timestamp: 5.5 NoteOn Channel: 1 Note: 69 Velocity: 127 Timestamp: 5 NoteOff Channel: 1 Note: 71 Velocity: 0 Timestamp: 5 NoteOn Channel: 1 Note: 71 Velocity: 127 Timestamp: 4.5 NoteOff Channel: 1 Note: 72 Velocity: 0 Timestamp: 4.5 NoteOn Channel: 1 Note: 72 Velocity: 127 Timestamp: 4 NoteOff Channel: 1 Note: 72 Velocity: 0 Timestamp: 3.75 NoteOn Channel: 1 Note: 72 Velocity: 127 Timestamp: 3.5 NoteOff Channel: 1 Note: 71 Velocity: 0 Timestamp: 3.5 NoteOn Channel: 1 Note: 71 Velocity: 127 Timestamp: 3 NoteOff Channel: 1 Note: 69 Velocity: 0 Timestamp: 3 NoteOn Channel: 1 Note: 69 Velocity: 127 Timestamp: 2.5 NoteOff Channel: 1 Note: 67 Velocity: 0 Timestamp: 2.5 NoteOn Channel: 1 Note: 67 Velocity: 127 Timestamp: 2 NoteOff Channel: 1 Note: 65 Velocity: 0 Timestamp: 1.75 NoteOn Channel: 1 Note: 65 Velocity: 127 Timestamp: 1.5 NoteOff Channel: 1 Note: 64 Velocity: 0 Timestamp: 1.5 NoteOn Channel: 1 Note: 64 Velocity: 127 Timestamp: 1 NoteOff Channel: 1 Note: 62 Velocity: 0 Timestamp: 1 NoteOn Channel: 1 Note: 62 Velocity: 127 Timestamp: 0.5 NoteOff Channel: 1 Note: 60 Velocity: 0 Timestamp: 0.5 NoteOn Channel: 1 Note: 60 Velocity: 127 Timestamp: 0 = createMessage(message,ts,deltaTime,ticksPerQNote,BPM) Įnd % Push chunkIndex to next track chunk % Extract relevant data - Create midimsg object
= interpretMessage(statusByte,ptr,readOut) % Push pointer to beginning of MIDI message Used for running status support % Parse MIDI track events in inner loop while ptr < chunkIndex+chunkLength Ptr = 8+chunkIndex % Determine start for MIDI event parsing % Read header of track chunk, find chunk length % Add 8 to chunk length to account for track chunk header lengthĬhunkLength = polyval(readOut(chunkIndex+(5:8)),256)+8 % Parse track chunks in outer loop while chunkIndex < byteCount ChunkIndex = 14 % Header chunk is always 14 bytes
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