Bruno Zamborlin

I'm looking for a solution to parse in Max a standard Midi file and obtain its BPM track, with any possible variation.

I would like to do this when the file is loaded, without parse the whole file in real-time.

Dear all,
I'm looking for a solution to parse in Max a standard Midi file and obtain its BPM track, with any possible variation.

getting-bpm-track-from-a-midi-file

http://www.sonicspot.com/guide/midifiles.html

This meta event sets the sequence tempo in terms of microseconds per

quarter-note which is encoded in three bytes. It usually is found in the

first track chunk, time-aligned to occur at the same time as a MIDI

clock message to promote more accurate synchronization. If no set tempo

event is present, 120 beats per minute is assumed. The following

formula's can be used to translate the tempo from microseconds per

quarter-note to beats per minute and back.

I assume the app that creates the MIDI file must insert this event.

Subject: [maxmsp] Getting BPM track from a Midi file

> I'm looking for a solution to parse in Max a standard Midi file and 

> obtain its BPM track, with any possible variation.

> I would like to do this when the file is loaded, without parse the 

>From http://www.sonicspot.com/guide/midifiles.html

Set Tempo
This meta event sets the sequence tempo in terms of microseconds per
quarter-note which is encoded in three bytes. It usually is found in the
first track chunk, time-aligned to occur at the same time as a MIDI
clock message to promote more accurate synchronization. If no set tempo
event is present, 120 beats per minute is assumed. The following
formula's can be used to translate the tempo from microseconds per
quarter-note to beats per minute and back.

BPM = MICROSECONDS_PER_MINUTE / MPQN
MPQN = MICROSECONDS_PER_MINUTE / BPM

----- Original Message -----
From: Bruno Zamborlin 
Date: Thursday, October 18, 2007 5:28 pm
Subject: [maxmsp] Getting BPM track from a Midi file

>
> Dear all,
> I'm looking for a solution to parse in Max a standard Midi file and 
> obtain its BPM track, with any possible variation.
>
> I would like to do this when the file is loaded, without parse the 
> whole file in real-time.
>
> Many thanks
> --
> Bruno
>
> www.brunozamborlin.com
> www.myspace.com/brunozamborlin
>


However, I'm looking for a solution to get the whole tempo track, not just the inizial BPM.

I would like to fill an "envi" or "function" max object with the tempo track of the midi file I load.

Should I write myself a parser in C or does it exist something I could use it?

If you wanted to parse it yourself, then you would have to go

through all the data and keep track of the change of events in 

relation to each other. Unfortunately Max does not have and handy

object that lets you step through MIDI events. "Seq" is pretty

limited. If you are adept at coding and can write your own 

externals then that is probably the way to go. Alternately 

one could do it is by using javascript file i/o. 

If you wanted to parse it yourself, then you would have to go
through all the data and keep track of the change of events in 
relation to each other. Unfortunately Max does not have and handy
object that lets you step through MIDI events. "Seq" is pretty
limited. If you are adept at coding and can write your own 
externals then that is probably the way to go. Alternately 
one could do it is by using javascript file i/o. 


PHPSESSID=ee4c00ac5819960883c12fb4d31be108&PHPSESSID=ee4c00ac5819960883c 

12fb4d31be108&request=midifile&operateur=AND&id_plateforme=0&Submit=OK

psw.midifile-parser is what you are looking for

On 19.10.2007, at 13:28, Bruno Zamborlin wrote:

> However, I'm looking for a solution to get the whole tempo track, 

> I would like to fill an "envi" or "function" max object with the 

> Should I write myself a parser in C or does it exist something I 

http://www.maxobjects.com/? 
PHPSESSID=ee4c00ac5819960883c12fb4d31be108&PHPSESSID=ee4c00ac5819960883c 
12fb4d31be108&request=midifile&operateur=AND&id_plateforme=0&Submit=OK

>
> Thank you Anthony.
>
> However, I'm looking for a solution to get the whole tempo track,  
> not just the inizial BPM.
>
> I would like to fill an "envi" or "function" max object with the  
> tempo track of the midi file I load.
>
> Should I write myself a parser in C or does it exist something I  
> could use it?
>
> Thank again
> --
> Bruno
>
> www.brunozamborlin.com
> www.myspace.com/brunozamborlin
