Midi files do not start at time 0 #619
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I've been generating some midi files by randomly picking rhythms and pitches. I append the messages with note_on signals where time is specified as the length of the note to be played in ticks. I then save the file and view the created midi file in Ableton, or listen to it on my media player. The files never start at the 0, and the entire pattern always seems to be shifted in time over by this same amount, which is different in every file I've created and which also doesn't seem to match any tick value I'm using. I've printed the midi tracks from the generated file in another python file and it seems like the first message is note_on, so I don't understand why the start time is not 0. |
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MIDI File messages |
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Oh, that makes sense. Thank for you for the response, Raphaël |
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MIDI File messages
timeholds a delta time value not a length. Delta time is the time in ticks before playing the next message.In your example your first
note_onmessage is set to start120ticks after theset_tempometa. You want this value at 0.