leaozinho

I have a [seq] object playing a .midi file - is there any way to get any information about what is going on with the file's timing, specifically the information about ticks for each note? I know that you can send [seq] messages in ticks that alter the speed of playback, but I'm wondering how I can see the file's original timing information (in ticks). This seems like it's not possible with [seq], so I'm wondering if there's another way to get that information in MAX?

I have a [seq] object playing a .midi file - is there any way to get any information about what is going on with the file's timing, specifically the information about ticks for each note?  I know that you can send [seq] messages in ticks that alter the speed of playback, but I'm wondering how I can see the file's original timing information (in ticks).  This seems like it's not possible with [seq], so I'm wondering if there's another way to get that information in MAX?

I have a [seq] object playing a .midi file - is there any way to get any information about what is going on with the file's timing, specific

-seq-and-information-about-ticks

- if the first bit from 15 is "1", the files division is not set in PPQ but in SMPTE frames instead.

- if the first bit is "0", from the next bit on (not sure how long?) this is the ppq number.

take this number and do 60,000 / PPQ * BPM and you have the resolution/division in milliseconds. :)


 - open it with [filein]
 - search for "MThd "
 - if there is an  MThd, go to bit 15
 - if the first bit from 15 is "1", the files division is not set in PPQ but in SMPTE frames instead.
 - if the first bit is "0",  from the next bit on (not sure how long?) this is the ppq number.

take this number and do 60,000 / PPQ * BPM and you have the resolution/division in milliseconds. :)



Is there an example patch you could include for how to do this? I'm not familiar with [filein]...

Is there an example patch you could include for how to do this?  I'm not familiar with [filein]...

it is a very abstract thing but at the same also very straightforward to read in files as bits and bytes.

with [filein] you could easily recreate everything what [seq] does, for example. 

in my opinion it is perfect for midi files.

unfortunately it is sometimes a bit weird how midi specs are documented. 

https://www.csie.ntu.edu.tw/~r92092/ref/midi/

here trial and error used to be my best friends.

i dont get the ppq part to work now without my music computer, but here is the first two "tests"

#P message 364 381 137 9109522 4d 54 72 6b;

#P message 201 381 137 9109522 77 84 114 107;

#P comment 17 31 100 9109513 is it a midi file?;

#P message 114 59 90 9109513 14 \, 15 \, 16 \, 17;

#P message 17 59 50 9109513 0 \, 1 \, 2 \, 3;

#P newex 144 148 213 9109513 filein seq_sc.midi;

#P comment 574 249 60 9109513 bang on EOF;

#P comment 579 210 186 9109513 bang when "read" operation finished;

#P comment 114 31 100 9109513 does it have tracks?;


it is a very abstract thing but at the same also very straightforward to read in files as bits and bytes.

with [filein] you could easily recreate everything what [seq] does, for example. 

in my opinion it is perfect for midi files.

unfortunately it is sometimes a bit weird how midi specs are documented. 
https://www.csie.ntu.edu.tw/~r92092/ref/midi/
here trial and error used to be my best friends.

i dont get the ppq part to work now without my music computer, but here is the first two "tests"

#P window setfont "Sans Serif" 18.;
#P window linecount 1;
#P message 364 381 137 9109522 4d 54 72 6b;
#P window setfont "Sans Serif" 9.;
#P newex 364 349 78 9109513 prepend set;
#P newex 364 302 59 9109513 zl group 4;
#P newex 364 272 83 9109513 sprintf %0x;
#P window setfont "Sans Serif" 18.;
#P message 201 381 137 9109522 77 84 114 107;
#P window setfont "Sans Serif" 9.;
#P newex 201 349 78 9109513 prepend set;
#P newex 201 302 59 9109513 zl group 4;
#P comment 17 31 100 9109513 is it a midi file?;
#P message 114 59 90 9109513 14 \, 15 \, 16 \, 17;
#P message 17 59 50 9109513 0 \, 1 \, 2 \, 3;
#P window setfont "Sans Serif" 18.;
#P message 42 381 137 9109522 M T r k;
#P window setfont "Sans Serif" 9.;
#P newex 42 349 78 9109513 prepend set;
#P newex 42 302 59 9109513 zl group 4;
#P newex 42 272 59 9109513 itoa;
#P message 515 41 50 9109513 read;
#P newex 144 148 213 9109513 filein seq_sc.midi;
#B color 5;
#P comment 574 249 60 9109513 bang on EOF;
#P comment 579 210 186 9109513 bang when "read" operation finished;
#P button 557 247 15 0;
#P button 557 213 15 0;
#P comment 114 31 100 9109513 does it have tracks?;
#P connect 5 0 7 0;
#P connect 7 0 8 0;
#P connect 8 0 9 0;
#P connect 9 0 10 0;
#P connect 12 0 5 0;
#P connect 11 0 5 0;
#P connect 6 0 5 0;
#P connect 5 0 14 0;
#P connect 14 0 15 0;
#P connect 15 0 16 0;
#P connect 5 0 17 0;
#P connect 17 0 18 0;
#P connect 18 0 19 0;
#P connect 19 0 20 0;
#P connect 5 2 1 0;
#P connect 5 1 2 0;
#P window clipboard copycount 21;


Looks like your patch got mis-formatted or something, could you try again?

[seq] and information about ticks