Midi file editing

bhumika

Hi
I need to edit midi files with midi class in php. Can somebody help me how to change the speed of file?

Also can somebody help me in finding some good links which can help me in understanding the xml format of midi?

Would be greatly helpful.
Thanks

johanafm

Knowing nothing about this at all, "let me google that for you" found this DTD as the first hit for "midi xml format", and if you want to know what the format looks like, the DTD is your definitive go to resource. There do however appear to be more than one version. At least v 1.0 and 2.0.

bhumika

Thanks.

But I also got this link in my search and the issue is this that I am new to this. I was also studying some midi files(XML format) and with this I couldn't come to the sequence of its elements and attributes.

http://www.hisschemoller.com/2009/midi-and-xml/ This helped me in understanding the basics but I would like to clear out the sequence of all attributes.

Thanks

johanafm

The DTD is the place to find out what attributes can or have to be present in each element. For example, from the DTD

<!ELEMENT SMPTEOffset EMPTY>
<!ATTLIST SMPTEOffset
        TimeCodeType    NMTOKEN  #REQUIRED
        Hour            NMTOKEN  #REQUIRED
        Minute          NMTOKEN  #REQUIRED
        Second          NMTOKEN  #REQUIRED
        Frame           NMTOKEN  #REQUIRED
        FractionalFrame NMTOKEN  #REQUIRED>

it should be evident that the SMPTEOffset element can be empty and also what attributes are needed.

But there is no sequence to attributes: their respective order is irrelevant. It does not matter if you do either of these

<SMPTEOffset Hour="" Minute="" ...>
<SMPTEOffset Minute="" Hour="" ...>

bhumika

But I am not still 100% confident about what I got from here. Can anybody tell me if there is any live example (composer) which can help me out to understand this?