FIrst thing I need to know is do you need to synchronize anything that is
not MIDI with your midi file?
if not, you don't need these events.
Let me know...
----- Original Message -----
From: "Maarten de Vries" <[EMAIL PROTECTED]>
To: "REALbasic NUG" <[email protected]>
Sent: Thursday, August 10, 2006 1:35 PM
Subject: Re: MIDI type 1
>I think I made a mistake.. my script (which I used to search) didn't
search
> correctly. Whenever an undefined meta event was encountered, it was
> supposed
> to ignore everything until the end byte. But it was ignoring everything
> including the end byte. So, it started ignoring everything somewhere
> before
> the first &h9* command... But now I have a new questions :-(. This MIDI
> stuff is awfully complicated.
>
> I need help on using some meta events.. these to be exact:
>
> FF 51 03 tttttt* Set Tempo, in microseconds per MIDI quarter-note*
>> This event indicates a tempo change. Another way of putting
"microseconds
>> per quarter-note" is "24ths of a microsecond per MIDI clock".
>> Representing
>> tempos as time per beat instead of beat per time allows absolutely
exact
>> long-term synchronization with a time-based sync protocol such as
>> SMPTE
>> time
>> code or MIDI time code. This amount of accuracy provided by this tempo
>> resolution allows a four-minute piece at 120 beats per minute to be
>> accurate
>> within 500 usec at the end of the piece. Ideally, these events should
>> only
>> occur where MIDI clocks would be located Q this convention is intended
to
>> guarantee, or at least increase the likelihood, of compatibility with
>> other
>> synchronization devices so that a time signature/tempo map stored in
this
>> format may easily be transferred to another device.
>>
>> FF 54 05 hr mn se fr ff* SMPTE Offset*
>> This event, if present, designates the SMPTE time at which the track
>> chunk
>> is supposed to start. It should be present at the beginning of the
track,
>> that is, before any nonzero delta-times, and before any transmittable
>> MIDI
>> events. The hour must be encoded with the SMPTE format, just as it is
in
>> MIDI Time Code. In a format 1 file, the SMPTE Offset must be stored
with
>> the
>> tempo map, and has no meaning in any of the other tracks. The ff field
>> contains fractional frames, in 100ths of a frame, even in SMPTE-based
>> tracks
>> which specify a different frame subdivision for delta-times.
>>
>> FF 58 04 nn dd cc bb* Time Signature*
>> The time signature is expressed as four numbers. nn and dd represent
the
>> numerator and denominator of the time signature as it would be
>> notated.
>> The
>> denominator is a negative power of two: 2 represents a quarter-note, 3
>> represents an eighth-note, etc. The cc parameter expresses the number
of
>> MIDI clocks in a metronome click. The bb parameter expresses the
>> number
>> of
>> notated 32nd-notes in a MIDI quarter- note (24 MIDI Clocks). This was
>> added
>> because there are already multiple programs which allow the user to
>> specify
>> that what MIDI thinks of as a quarter-note (24 clocks) is to be
>> notated
>> as,
>> or related to in terms of, something else.
>>
>
> First off all, the tempo change. I use units of a tick. I'm not sure,
but
> a
> division of 30 seems to be that (I expected 60, but that was to fast).
> Anyway, how do I convert the delta time from the files to ticks? Of
> cource,
> I'll need the division in the header to...
>
> The SMPTE offset seems clear, except for the fr and ff. What do they
mean?
>
> And then time signature... Do I even need this? And if so, what
influence
> does it have?
>
> I'm sorry if this seems a bit stupid, but it's just to much dividing
> and
> stuff. I get it all mixed in my head...
>
> Thanks again,
> Maarten
>
> On 10/08/06, stephane richard <[EMAIL PROTECTED]> wrote:
>>
>> What does the file play in media player?
>>
>> You can have sysex messages stored in a midi file of course, but they
>> wouldn't play sounds per se (though some might play effects of some
>> sort)....
>>
>> So if the midi file without &H9* events plays a song, i'd like to see
>> it...
>>
>> I supposed you can play notes in Sysex only ultimately, but that's
>> like
>> the
>> hard way to do things ;-). if it doesn't infringe any copyrights, I'd
>> like
>> to have that midi file so I can take it apart ;-).
>>
>> ..
>> ----- Original Message -----
>> From: "Maarten de Vries" <[EMAIL PROTECTED]>
>> To: "REALbasic NUG" <[email protected]>
>> Sent: Thursday, August 10, 2006 8:15 AM
>> Subject: Re: MIDI type 1
>>
>>
>> >I have another question. Or a problem actually. I'm trying to load a
>> >type
>> 1
>> > MIDI file, but nowhere in the entire file is a byte with &h9*. So,
>> > there
>> > isn't a single play note status byte in the entire file. If I open
>> > it
>> with
>> > media player it works fine though. There are a few FF bytes. They
seam
>> to
>> > mean "reset", but what can I do with that? I really don't understand
>> > how
>> > you
>> > can make a MIDI file withough any &h9* in it...
>> >
>> > Thanks,
>> > Maarten
>> >
>> >
>> > On 10/08/06, stephane richard <[EMAIL PROTECTED]> wrote:
>> >> >
>> >> > internally, on the sound card, it wouldn't make a difference...if
>> >> > you
>> >> > have 2
>> >> > midi instruments on these two channels, then you should play them
on
>> >> > the
>> >> >
>> >> > same channel (hence the same instrument).
>> >> >
>> >> >
>> >>
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