pedroalvesv / luamidi Goto Github PK

It would be great to include a way to easily calculate at what time events are placed instead of deltatime.
Is there a way to do it?

Example program:

local LuaMidi = require ('LuaMidi');

local tracks = LuaMidi.get_MIDI_tracks("tetris.midi");
events = tracks[2]["events"]

for i=2, #events do
	console.log(events[i]:get_duration()); --no return value
end

Tetris.midi in a zip file.

On line 147 of LuaMidi.lua, the event table created for the new NoteEvent doesn't have duration information. I gave a look at raw_note myself but it was tough to determine how to find a duration from that.

I take it what needs to happen is looking at the difference between a NoteOn and NoteOff event, but I'm not familiar enough with the MIDI spec or how the data is being digested to really discern how to figure that information out.

Crashed because of missing META_PREFIX_PORT event.

I added it to the CONSTANTS:

   META_CUE_POINT         = 0x07,
   META_PREFIX_PORT       = 0x21,
   META_TEMPO_ID          = 0x51,
   META_TIME_SIGNATURE_ID = 0x58,

and

[33]="Prefix Port", [81] = "Tempo",[88] = "Time Signature",[89] = "Key Signature"}

and it moved past that point, but crashed soon thereafter.

Unfortunately, I can't find a good tool to view the actual MIDI file contents and I haven't had time to dig through your code, so I can't offer a suggestion as to what went wrong next.

Hello, do you have any more sample files(just like a whole song)? I want to explore a better writing scheme. If not, I can build one for this project.☺️

I'm using Lua 5.4.4. After installing LuaMidi using luarocks, the following script throws an error:

local LuaMidi = require('LuaMidi')
print(LuaMidi.get_MIDI_tracks)
local tracks = LuaMidi.get_MIDI_tracks('./tracks/hot_cross_buns.mid')
print(tracks)

The value of the function LuaMidi.get_MIDI_tracks is printed as nil and an error is thrown.

Elliot@MacBook-Air harp-hero % lua build/import-midi.lua
nil
lua: build/import-midi.lua:3: attempt to call a nil value (field 'get_MIDI_tracks')
stack traceback:
        build/import-midi.lua:3: in main chunk
        [C]: in ?

Not sure what I'm doing wrong here. Unfortunately I couldn't find any examples in the documentation for how to use this function. Any help appreciated!

Hello,
how to create a dash between notes or a chord ?
thanks