midiutil | It 's a pure Python MIDI library
kandi X-RAY | midiutil Summary
kandi X-RAY | midiutil Summary
MIDIUtil is a pure Python library that allows one to write multi-track Musical Instrument Digital Interface (MIDI) files from within Python programs. It is object-oriented and allows one to create and write these files with a minimum of fuss. MIDIUtil isn't a full implementation of the MIDI specification. The actual specification is a large, sprawling document which has organically grown over the course of decades. I have selectively implemented some of the more useful and common aspects of the specification. The choices have been somewhat idiosyncratic; I largely implemented what I needed. When I decided that it could be of use to other people I fleshed it out a bit, but there are still things missing. Regardless, the code is fairly easy to understand and well structured. Additions can be made to the library by anyone with a good working knowledge of the MIDI file format and a good, working knowledge of Python. Documentation for extending the library is provided. This software was originally developed with Python 2.5.2 and it makes use of some features that were introduced in 2.5. I have used it extensively in Python 2.6.
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Top functions reviewed by kandi - BETA
- Write MIDI events to stream .
- Compute equality of two objects .
- Add Universal System System .
- Calculate the length of the variable length
- Calculate the length of a variable .
- Convert a float to a decimal frequency .
- Convert a floating point number to a decimal value .
- Read a variable length from a buffer .
- Read variable length from buffer .
- Compare two time series .
midiutil Key Features
midiutil Examples and Code Snippets
Community Discussions
Trending Discussions on midiutil
QUESTION
Im trying to write a complete music using midiutil library with python. So far, i have been able to add any instrument i've wanted via
MIDIFile.addProgramChange(track, channel, time, program)
and taking the program number from the table at https://www.midi.org/specifications-old/item/gm-level-1-sound-set
However, i cant add any drumset sounds the way i want. I know channel 10 is reserved for percussion, but whenever i write anything via
MyMIDI.addNote(track, 10, pitch, time + i, duration, volume)
the sound played by musescore is played in the piano voice or in the voice defined by the ProgramChange method. I know there is drumset sounds somewhere in my computer because i have been able to manually add drumset sounds in musescore. Am i doing something wrong?
...ANSWER
Answered 2021-May-16 at 18:07Humans begin counting at one, so you have channels 1 … 16.
Computers begin couting at zero, so they have channels 0 … 15.
The addNote() documentation says that the channel parameter is an integer from 0 to 15, so you must use 9 for the percussion channel.
QUESTION
I want to write a MIDI file with the inputs I receive from the digital piano I have connected. I am using pygame.midi to open an input port and midiutil to write the MIDI file. What I can't wrap my head around is the timing. For example, in addNote(track, channel, pitch, time, duration, volume), how do I know what time and duration of a note is? When reading a note, I get pitch and volume just fine, but the others I have no idea... I tried using the timestamp but to no avail, it places the note really far away in the MIDI file.
So, how do I compute the 'time' and 'duration' of a note?
...ANSWER
Answered 2020-Nov-14 at 23:21time dictates the position in musical time the note should be played. Exactly what the parameter should be depends in part how the Midi file object was constructed (more on that soon)
In practice, MIDI asks for two messages per note: a NOTE On message and a NOTE Off message. The duration will indicate when the Note Off message should be sent, relative to the start of the note. Again, how the parameter should be formed depends on how the file object is constructed.
From the MIDIUtil docs:
- time – the time at which the note sounds. The value can be either quarter notes [Float], or ticks [Integer]. Ticks may be specified by passing eventtime_is_ticks=True to the MIDIFile constructor. The default is quarter notes.
- duration – the duration of the note. Like the time argument, the value can be either quarter notes [Float], or ticks [Integer]
A complete example that plays the C major scale
QUESTION
I was writing a program that used the windows midi interface, and at some point I was following the definition of a symbol and ended up in one of the windows headers. I must have accidentally edited it before closing it because now when I try to compile my code, I get literally hundreds of errors like:
...ANSWER
Answered 2020-Oct-11 at 18:51Q: Is there a way to revert the standard windows headers?
A: Yes. Restore from backup, or reinstall your SDK.
It sounds like you probably don't take backups ;)
If you got the SDK from Visual Studio, one option might be to simply reinstall MSVS.
The files you mention, C:\Program Files (x86)\Windows Kits\10\Include, are part of the Windows 10 SDK. It's installed when you install MSVS. You can also download it separately from here:
https://developer.microsoft.com/en-us/windows/downloads/windows-10-sdk/
QUESTION
I want to convert a sequence of notes (defined by time, duration, pitch) to a audio-file. For doing so, I thought creating a midi first and then compile it to wav is the way to go.
I'm quite new to audio processing and MIDI-Files, so even though I read several tutorials, it can be, that I didn't get the point.
Edit: I found the problem, see solution below.
What's the problem
Writing notes at a specific time with a specific duration via python's MIDIUtil doesn't work as expected. In fact, the time in seconds, where a note is placed heavily depends on the track's bpm, even though I think I took the bpm into account, when converting the note time to MIDI's time measure in quarter notes.
What I've tried
I'm creating a MIDI track with a given bpm.
Then I'm converting a note's event time via
t_{quarter} = t_{seconds} * bpm/60
Example
I'm writing with the following code two notes, the last at t=5 seconds with a duration of 1s; i.e. I'm expecting a midi-file with lasts 6seconds. But at a bpm=600, the file is 14s long. At a bpm=100 it's almost the expected 6s.
Here's my code
...ANSWER
Answered 2020-Mar-30 at 16:05first file:
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Install midiutil
Using the software is easy:. Detailed documentation is provided; what follows is a simple example to get you going quickly. In this example we'll create a one track MIDI File, assign a name and tempo to the track, add a one beat middle-C to the track, and write it to disk. There are several additional event types that can be added and there are various options available for creating the MIDIFile object, but the above is sufficient to begin using the library and creating note sequences. The above code is found in machine-readable form in the examples directory. A detailed class reference and documentation describing how to extend the library is provided in the documentation directory.
The package must be imported into your namespace
A MIDIFile object is created
Events (notes, tempo-changes, etc.) are added to the object
The MIDI file is written to disk.
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