In my view, the header should be changed. MIDI files output by Csound should 
be playable in standard MIDI file players and importable with correct time 
values into sequencers.

Regards,
Mike

----- Original Message ----- 
From: "Tim Mortimer" 
To: 
Sent: Saturday, December 15, 2007 8:48 PM
Subject: [Csnd] Re: --midioutfile properties - bug fix request


>
> So now (again thanks to Tim Thompson), I understand the Csound midioutfile 
> is
> specifying the tempo in SMPTE frames-per-second and ticks-per-frame, not
> beat divisions
>
> he's sent me a modified keykit that reads this format - at the moment it
> doesn't respond to tempo statements from keykit, but given he's sorted 
> every
> other problem pretty much "on the spot", hopefully this is the final 
> hurdle
> to cross
>
> given i have had little in the way of compatability with this type of 
> header
> with the Csound midi file, i leave it to the developers to determine if a
> change in the header specification is desirable or not. This has been a
> somewhat long & convoluted "workaround" process (i.e. basically hassling
> somebody else into rewriting their program!)
>
>
>
>
>
> -- 
> View this message in context: 
> http://www.nabble.com/the---midioutfile-properties-tp14267381p14357362.html
> Sent from the Csound - General mailing list archive at Nabble.com.
>
>
>
> Send bugs reports to this list.
> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe 
> csound" 

I agree 100%.

Our MIDI must be compatible and standard!

This is very important and will be even more important with all
the OLPC machines running Csound as their main synthesis/dsp engine.

-dB


On Dec 15, 2007, at 10:44 PM, Michael Gogins wrote:

> In my view, the header should be changed. MIDI files output by  
> Csound should be playable in standard MIDI file players and  
> importable with correct time values into sequencers.
>
> Regards,
> Mike
>
> ----- Original Message ----- From: "Tim Mortimer"  
> 
> To: 
> Sent: Saturday, December 15, 2007 8:48 PM
> Subject: [Csnd] Re: --midioutfile properties - bug fix request
>
>
>>
>> So now (again thanks to Tim Thompson), I understand the Csound  
>> midioutfile is
>> specifying the tempo in SMPTE frames-per-second and ticks-per- 
>> frame, not
>> beat divisions
>>
>> he's sent me a modified keykit that reads this format - at the  
>> moment it
>> doesn't respond to tempo statements from keykit, but given he's  
>> sorted every
>> other problem pretty much "on the spot", hopefully this is the  
>> final hurdle
>> to cross
>>
>> given i have had little in the way of compatability with this type  
>> of header
>> with the Csound midi file, i leave it to the developers to  
>> determine if a
>> change in the header specification is desirable or not. This has  
>> been a
>> somewhat long & convoluted "workaround" process (i.e. basically  
>> hassling
>> somebody else into rewriting their program!)
>>
>>
>>
>>
>>
>> -- 
>> View this message in context: http://www.nabble.com/the--- 
>> midioutfile-properties-tp14267381p14357362.html
>> Sent from the Csound - General mailing list archive at Nabble.com.
>>
>>
>>
>> Send bugs reports to this list.
>> To unsubscribe, send email sympa@lists.bath.ac.uk with body  
>> "unsubscribe csound"
>
>
>
> Send bugs reports to this list.
> To unsubscribe, send email sympa@lists.bath.ac.uk with body  
> "unsubscribe csound"

Anyone going to look at this --midioutfile problem?  Not sure who
wrote it or who claims it!
==John ffitch

"This research is of insufficient standard"

>>>>> "Richard" == Richard Boulanger  writes:

 Richard> I agree 100%.
 Richard> Our MIDI must be compatible and standard!

 Richard> This is very important and will be even more important with all
 Richard> the OLPC machines running Csound as their main synthesis/dsp engine.

 Richard> -dB


 Richard> On Dec 15, 2007, at 10:44 PM, Michael Gogins wrote:

 >> In my view, the header should be changed. MIDI files output by  
 >> Csound should be playable in standard MIDI file players and  
 >> importable with correct time values into sequencers.
 >> 
 >> Regards,
 >> Mike
 >> 
 >> ----- Original Message ----- From: "Tim Mortimer"  
 >> 
 >> To: 
 >> Sent: Saturday, December 15, 2007 8:48 PM
 >> Subject: [Csnd] Re: --midioutfile properties - bug fix request
 >> 
 >> 
 >>> 
 >>> So now (again thanks to Tim Thompson), I understand the Csound  
 >>> midioutfile is
 >>> specifying the tempo in SMPTE frames-per-second and ticks-per- 
 >>> frame, not
 >>> beat divisions
 >>> 
 >>> he's sent me a modified keykit that reads this format - at the  
 >>> moment it
 >>> doesn't respond to tempo statements from keykit, but given he's  
 >>> sorted every
 >>> other problem pretty much "on the spot", hopefully this is the  
 >>> final hurdle
 >>> to cross
 >>> 
 >>> given i have had little in the way of compatability with this type  
 >>> of header
 >>> with the Csound midi file, i leave it to the developers to  
 >>> determine if a
 >>> change in the header specification is desirable or not. This has  
 >>> been a
 >>> somewhat long & convoluted "workaround" process (i.e. basically  
 >>> hassling
 >>> somebody else into rewriting their program!)
 >>> 
 >>> 
 >>> 
 >>> 
 >>> 
 >>> -- 
 >>> View this message in context: http://www.nabble.com/the--- 
 >>> midioutfile-properties-tp14267381p14357362.html
 >>> Sent from the Csound - General mailing list archive at Nabble.com.
 >>> 
 >>> 
 >>> 
 >>> Send bugs reports to this list.
 >>> To unsubscribe, send email sympa@lists.bath.ac.uk with body  
 >>> "unsubscribe csound"
 >> 
 >> 
 >> 
 >> Send bugs reports to this list.
 >> To unsubscribe, send email sympa@lists.bath.ac.uk with body  
 >> "unsubscribe csound"



 Richard> Send bugs reports to this list.
 Richard> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound"




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Looking at the code, the problem is in InOut/midisend.c where we have

static const unsigned char midiOutFile_header[25] = {
    0x4D, 0x54, 0x68, 0x64,     /* "MThd"                       */
    0x00, 0x00, 0x00, 0x06,     /* header length                */
    0x00, 0x00,                 /* file type                    */
    0x00, 0x01,                 /* number of tracks             */
    0xE7, 0x78,                 /* tick time (1/25 sec / 120)   */
    0x4D, 0x54, 0x72, 0x6B,     /* "MTrk"                       */
    0x00, 0x00, 0x00, 0x00,     /* track length (updated later) */
    /* -------------------------------------------------------- */
    0xFF, 0x2F, 0x00            /* end of track                 */
};

I assume that the "0xE7, 0x78" is the problem.  What should it be?  
Heading the documentation it could be that the csoundWriteMidiOutFile
which outputs events get the calculation of delta-time wrong?

==John ffitch

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