1/16/2024 0 Comments Purebasic play midi file![]() ![]() The first character in this field specifies the duration, thus: The first field is the note duration and type. Here are the definitions, keeping in mind that we want to keep the parser simple.Įach "event" would occupy one line consisting of comma-separated values (so that the file could be edited in a spreadsheet program). I also don't want to make the notation too cryptic for the user.įor a multichannel version I am thinking an event would be specified thus: I don't see it as burdensome having to specify the octave for each note and it will simplify the parser by omitting it. I am thinking there would be maybe 16 channels, with an instrument assigned to each. Each line of the header could have a comment demarcated by a "," viz.: Traditionally a chord consists of two or more notes so we are cheating a little bit by having one-note "chords".Įach music file would have a header which would specify tempo in BPM and give the instrument definitions. A chord consists of 1 to 10 notes of the same duration played in unison. Rather than individual notes there would be chords. Here are some ideas for a multichannel version. I will post that when I'm on my regular computer. What I've posted is more a demo program than a complete application.Īs I said I wrote a test program using the timer to initiate "MIDI" events. # 2.My objective for this program is to keep it very, very simple for user and programmer alike, especially to keep the notation simple as well as the programming. ![]() SCadence2_mStrFile = cStringIO.StringIO(sCadence2_mStr) # now let's make a new music21 Score by reversing the upperPart notes Print "File %s not found! (%s)" % (music_file, pygame.get_error()) Print "Music file %s loaded!" % music_file This will stream the sound from disk while playing Stream music with mixer.music module in blocking manner SCadence_mStrFile = cStringIO.StringIO(sCadence_mStr) # Now, let's play the MIDI of the sCadence Score using pygame # Now, we can add both Part objects into a music21 Score object. # For the music21 Upper Part, we automate the note creation procedureĭata1 = # we create the music21 Bottom Part, and do this explicitly, one object at a time. # genPlayM21Score.py Generates and Plays 2 Music21 Scores "on the fly". Here's a python script that works on Windows XP. There is also an endFunction and endArgs that will be called at the end, in case you want to set up some sort of threaded playback. play() function can also take busyFunction and busyArgs and busyWaitMilliseconds arguments which specify a function to call with arguments at most every busyWaitMilliseconds (could be more if your system is slower). KeyDetune.append(random.randint(-30, 30)) ![]() # and play a Bach Chorale on it in real time. ![]() # but consistent detuning from 30 cents flat to sharp) Here's an example that takes music21's ability to dynamically allocate midi channels with different pitch-bend objects in order to simulate microtonal playback (a major problem for most midi playback): # Set up a detuned piano We're not planning on putting too much work into playback systems (because of the hardware support, our being a tiny research lab, the work still needing to be done on musical analysis, etc.), but your solution is so elegant that it is now included in all versions of music21 (post v1.1) as the module. As you've seen, music21 isn't designed to be a music playback system, but it IS designed to be embedded within other playback systems or to call them from within the system. ![]()
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