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<A NAME="CHILD_LINKS"><STRONG>Subsections</STRONG></A>
<UL CLASS="ChildLinks">
<LI><A NAME="tex2html66"
HREF="node3.html#SECTION00310000000000000000">Fella Bird, Basic Edition</A>
<LI><A NAME="tex2html67"
HREF="node3.html#SECTION00320000000000000000">Fella Bird, Improved Edition</A>
</UL>
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<HR>
<H1><A NAME="SECTION00300000000000000000">
A Simple Example</A>
</H1>
<P>
<H1><A NAME="SECTION00310000000000000000">
Fella Bird, Basic Edition</A>
</H1>
<P>
<Table Hspace="40%" CellSpacing=0 CellPadding=10 BGColor="#efefef" Border=3>
<tr><td Align="CENTER" BGColor="White">
<SPAN CLASS="textbf"><BIG CLASS="XLARGE">Sheet Music for a Popular Song</BIG></SPAN> <A NAME="eg:birthday"></A>
</tr> </td>
<tr> <td >
<IMG WIDTH="95%" SRC="mup/fella.png" ALT="Lost Image">
</td> </tr>
</Table>
<P>
<P>
This example piece of music is shown in a “fake book” or “lead sheet”
style. It shows the melody notes, lyrics and chords.
<P>
As a first try at making a MIDI accompaniment file, we have created the
following file:
<P>
<SPAN CLASS="textbf">// Sample tutorial file
<BR>// Fella Bird, try 1
<BR>
<BR>
Tempo 120
<BR>
Groove Rhumba
<BR>
<BR>
1 F
<BR>
2 F
<BR>
3 C7
<BR>
4 F
<BR>
5 F
<BR>
6 F
<BR>
7 C7
<BR>
8 F
<BR>
9 Gm
<BR>
10 F
<BR>
11 C7
<BR>
12 F
<BR>
13 Gm
<BR>
14 F
<BR>
15 C7
<BR>
16 F / / z!
<BR>
<BR></SPAN>
<P>
After the comments in the file, the first line to note is:
<P>
<Table Hspace="40%" CellSpacing=0 CellPadding=10 BGColor="OldLace" Border=3>
<tr><td>
<B>Tempo 120 </B>
</td></tr>
</Table>
<P>
This sets the tempo, or speed, of the piece to 120 beats per minute. You may
have to guess the tempo--very few pieces (especially in “fake book” style)
will include a metronome setting. For slow pieces you might want to start with a
tempo setting of “80”; for faster pieces, like swings, try around “150”; polkas
and marches, which are really in <SPAN CLASS="textbf">2/2</SPAN> time, may require fast
sounding tempos like “250”. Feel free to modify the tempo setting in
the example files--you're not going to break anything.
<P>
Since we are using the standard library which was shipped with
<FONT Face="Serif" Color="Navy"><I>MMA</I></FONT> ,
we can select one of the predefined grooves:
<P>
<Table Hspace="40%" CellSpacing=0 CellPadding=10 BGColor="OldLace" Border=3>
<tr><td>
<B>Groove Rhumba </B>
</td></tr>
</Table>
<P>
Note that this command also sets up the “time signature” to <SPAN CLASS="textbf">4/4</SPAN>.
Not quite the same as the “cut” time indicated, but close enough. And speaking
of “close enough”, we're using a rhumba rhythm instead of the merengue indicated
in the score.
<P>
Finally, we have the chord information. The first bar (in the sheet music)
indicates an “F” chord. So that's what we tell
<FONT Face="Serif" Color="Navy"><I>MMA</I></FONT> to use:
<P>
<Table Hspace="40%" CellSpacing=0 CellPadding=10 BGColor="OldLace" Border=3>
<tr><td>
<B>1 F </B>
</td></tr>
</Table>
<P>
We continue in a similar manner for the rest of the song.
<P>
We've simplifed the song a bit and show only one chord per bar.
<FONT Face="Serif" Color="Navy"><I>MMA</I></FONT> automatically fills out the bars so that each has four chords.
We could have entered the first bar as:
<P>
<Table Hspace="40%" CellSpacing=0 CellPadding=10 BGColor="OldLace" Border=3>
<tr><td>
<B>2 F F F F </B>
</td></tr>
</Table>
<P>
or, more simply:
<P>
<Table Hspace="40%" CellSpacing=0 CellPadding=10 BGColor="OldLace" Border=3>
<tr><td>
<B>2 F / / / </B>
</td></tr>
</Table>
<P>
and had the same result. But, who wants to do all that typing?
<P>
In the final bar, the last beat is a rest.
<P>
The line:
<P>
<Table Hspace="40%" CellSpacing=0 CellPadding=10 BGColor="OldLace" Border=3>
<tr><td>
<B>16 F / / z! </B>
</td></tr>
</Table>
<P>
causes an “F” chord to be used on the first three beats, the fourth
beat is completely silent due the to the “z!”. Note the difference
between a “z” and “z!”--the first silences all but the drum track,
the second silences everything. See the reference manual for more details
on “z”.
<P>
Now, let's create our first MIDI file! If you are using the standard
distribution, you should find a file “fella1.mma” in the tutorial directory.
Change to this directory and type the command:
<P>
<Table Hspace="40%" CellSpacing=0 CellPadding=10 BGColor="OldLace" Border=3>
<tr><td>
<B>mma fella1 </B>
</td></tr>
</Table>
<P>
Your computer should run the python script called “mma” and process the
file “fella1.mma”. The MIDI file “fella1.mid” should be created. If this doesn't
happen, please check your python installation, and make sure that you
have installed “mma” where your shell can find it. If you are completely stuck,
drop me an email.
<P>
Now, use your favorite MIDI file player to play the song.
<P>
How'd that sound? A piano doing some chords, a jazzy bass line,
and a bit of drumming? Wonderful!
<P>
<H1><A NAME="SECTION00320000000000000000">
Fella Bird, Improved Edition</A>
</H1>
<P>
If you play the MIDI created in the previous section you'll find a number
of things lacking. Certainly:
<P>
<UL>
<LI>It is hard to sing to because there is no aural indication of
when to start,
<P>
</LI>
<LI>The whole piece is the same volume,
<P>
</LI>
<LI>It's a pretty short song, so let's play it twice.
<P>
</LI>
</UL>
<P>
The following example has a number of improvements:
<P>
<SPAN CLASS="textbf"> // Sample tutorial file
<BR>// Fella Bird, try 2
<BR>
<BR>
Tempo 120
<BR>
Groove Metronome2-4
<BR>
<BR>
z * 2
<BR>
<BR>
Groove Rhumba
<BR>
Repeat
<BR>
Volume mp
<BR>
Cresc mf 4
<BR>
<BR>
1 F
<BR>
2 F
<BR>
3 C7
<BR>
4 F
<BR>
5 F
<BR>
6 F
<BR>
7 C7
<BR>
8 F
<BR>
9 Gm
<BR>
10 F
<BR>
11 C7
<BR>
<BR>
Decresc p 4
<BR>
<BR>
12 F
<BR>
13 Gm
<BR>
14 F
<BR>
15 C7
<BR>
<BR>
RepeatEnding
<BR>
<BR>
16 F / / z
<BR>
<BR>
RepeatEnd
<BR>
<BR>
17 F / / z!
<BR>
cut -1
<BR>
<BR>
<BR></SPAN>
Try running
<FONT Face="Serif" Color="Navy"><I>MMA</I></FONT> on this file and listen to it. Oh my, much better.
<P>
So, let's look at the changes.
<P>
<Table Hspace="40%" CellSpacing=0 CellPadding=10 BGColor="OldLace" Border=3>
<tr><td>
<B>Groove Metronome2-4 </B>
</td></tr>
</Table>
<P>
This sets the current “groove” to a metronome. To find this groove
<FONT Face="Serif" Color="Navy"><I>MMA</I></FONT> will automatically process the library file “metronome”.
<P>
The metronome groove consists of wood-blocks being struck in a
<SPAN CLASS="textbf">4/4</SPAN> pattern. In order to “sound” the metronome, we need
to create an empty bar:
<P>
<Table Hspace="40%" CellSpacing=0 CellPadding=10 BGColor="OldLace" Border=3>
<tr><td>
<B> z * 2 </B>
</td></tr>
</Table>
<P>
Mind you, we could have specified a chord here and gotten the same
result (the groove has no definitions for any instruments other than
the wood-block, so nothing else will sound). But, it seems to be more
clear to use a “z”.
<P>
Okay, we lied. We didn't create an empty bar for the metronome. If
you're sharp you'll notice that the “z” is followed by “* 2”. This
means to play this bar two times. So, you get 2 bars of metronome.
Cool.
<P>
We've not made any changes to the chords, but a few little changes do
help this simple piece. Remember the dull, single volume? Well, have a
look at the “volume” directives we've included in this version. We
start the song off at a moderate volume, and increase it in several
steps. And, at the end we use a “decresc” to reduce the volume to
“quiet” over the final 4 bars.
<P>
Please refer to the
<FONT Face="Serif" Color="Navy"><I>MMA</I></FONT> Reference Manual for salient details on the
volume commands.
<P>
One minor change we did make in the chords is in bar 16. Note the
change between this and bar 17. In the first we have a “z”, the
second a “z!”. The difference between the two is that we want the
precussion tracks to continue though the ending, but not on the final
beat.
<P>
Finally, to ensure a complete cutoff in the final bar we have added a
“cut” command. We're sure you'll find these minor changes a great
improvement.
<P>
<P>
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<ADDRESS>
bob
2010-11-07
</ADDRESS>
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