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  1. #1
    Carl.
    Guest
    Now and then I find a MIDI that won't play properly on my phone, even when
    the number of tracks are reduced to just a few (usually gets stuck on a note
    and then speeds up).

    To resolve this, I used PSMplay to convert a MIDI to 40 chord .mmf and back
    again. I checked and the resulting file had all of the original notes. It
    also plays just fine.

    But the new file is only 4k, while the original was 13k. What was removed?


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    See More: Very big file size reduction when converting MIDI to mmf




  2. #2
    Jutta
    Guest

    Re: Very big file size reduction when converting MIDI to mmf

    Very Briefly,

    Many MIDI files contains a LOT of information
    that gets deleted upon conversion to .mmf
    For instance, channel aftertouch, pitchbend (very common),
    polyphonic aftertouch (less common). And let me tell
    you, even the first two can generate amounts of data
    that dwarf the note-#-on-and-offs that you're left with.

    That's a pretty simply explanation. Rock On!


    Jutta




    On 02 Jan 2004, you wrote in alt.cellular.ericsson:

    > Now and then I find a MIDI that won't play properly on my phone, even
    > when the number of tracks are reduced to just a few (usually gets
    > stuck on a note and then speeds up).
    >
    > To resolve this, I used PSMplay to convert a MIDI to 40 chord .mmf and
    > back again. I checked and the resulting file had all of the original
    > notes. It also plays just fine.
    >
    > But the new file is only 4k, while the original was 13k. What was
    > removed?




  3. #3
    Carl.
    Guest

    Re: Very big file size reduction when converting MIDI to mmf

    Thanks for the info. I later noticed on other files that the pitch bend
    effects were gone.

    What is a channel aftertouch?

    "Jutta" <[email protected]> wrote in message
    news:[email protected]
    > Very Briefly,
    >
    > Many MIDI files contains a LOT of information
    > that gets deleted upon conversion to .mmf
    > For instance, channel aftertouch, pitchbend (very common),
    > polyphonic aftertouch (less common). And let me tell
    > you, even the first two can generate amounts of data
    > that dwarf the note-#-on-and-offs that you're left with.
    >
    > That's a pretty simply explanation. Rock On!
    >
    >
    > Jutta
    >
    >
    >
    >
    > On 02 Jan 2004, you wrote in alt.cellular.ericsson:
    >
    > > Now and then I find a MIDI that won't play properly on my phone, even
    > > when the number of tracks are reduced to just a few (usually gets
    > > stuck on a note and then speeds up).
    > >
    > > To resolve this, I used PSMplay to convert a MIDI to 40 chord .mmf and
    > > back again. I checked and the resulting file had all of the original
    > > notes. It also plays just fine.
    > >
    > > But the new file is only 4k, while the original was 13k. What was
    > > removed?



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