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115 lines
3.6 KiB
Plaintext
115 lines
3.6 KiB
Plaintext
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A short tutorial on importing riffs with MidiInc.
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It's pretty easy, but a step by step never hurts! Here is what I did to
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create a short introduction to a song (The Summer Knows).
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1. I created a normal MMA file with a 4 bar intro and a 2 bar metronome.
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2. Compile the MMA file into a MIDI.
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-- we now have 2 files: summer.mid and summer.mma
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3. I imported the MIDI file into Rosegarden (however, any other recording
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program will work just as well).
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4. I played a simple, one note-at-a-time, introduction and saved it in
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channel 1. Just 4 bars of note data.
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5. Save the MIDI file under a new name (in Rosegarden this is File-Export).
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-- we now have 3 files: summer.mid, summer.mma and solo.mid
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6. Modify the original MMA file so we can analize the solo file. Just add
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the following line AFTER the metronome:
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MidiInc File=solo.mid Report=On
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save the file and run "mma summer.mma".
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You should get a print out on the screen with a bunch of information.
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The key line we want to look at is:
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Channel 1: First event 0 First Note 4361 Total Notes 15
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This is the melody we played. Note that our first note is played at
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offset 4361. Make a note of this value!
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7. Modify the original file again. This time we want to listen to the
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solo data, so change the MidiInc line to:
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MidiInc File=sol.mid Solo=1,riff Volume=200 StripSilence=4361
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Save and compile with "mma -P summer.mma". The song should play with
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a fairly loud solo, probably played with a piano. If the start time
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matches, go on. Otherwise you can modify the "StripSilence" value and try again.
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8. Modify the original file one more. This time we will suck the note data out:
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MidiInc File=sol.mid Solo=1,riff,print Volume=200 StripSilence=4361
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and complile. You should get a bunch of RIFF command lines on the screen.
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If it's working you can cut/paste off the screen or redirect into a
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scratch file.
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9. Back to the MMA file. Add some solo tracks, etc. and delete the MidiInc
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line (it's done it's work). My file ended up looking like this:
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/////////////////////////////////
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// Summer Knows
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Tempo 80 /// I think it was much slower in the movie
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Keysig F minor
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Groove Metronome2-4
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z * 2
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Groove GuitarBalladSusIntro
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Begin Solo
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Voice Strings
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Articulate 120
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Volume m
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Octave 5 // no effect since we're using midi pitch values
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Riff <Offset=0> 180t 68/102;<Offset=178> 92t 72/108;<Offset=272> 294t 68/98;<Offset=648> 49t 68/127;<Offset=757> 175t 68/127 ~;
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Riff <Offset=168> 102t 72/82;<Offset=274> 338t 68/104;<Offset=656> 96t 68/127;<Offset=756> 104t 70/102 ~;
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Riff <Offset=124> 90t 70/120;<Offset=248> 97t 70/127;<Offset=354> 107t 73/124;<Offset=462> 162t 70/127;<Offset=635> 127t 68/106;<Offset=762> 291t 67/118 ~;
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End
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Begin Solo-1
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Voice ChoirAahs
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HarmonyOnly OpenBelow
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octave 8 // Again, no effect
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Articulate 130
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Volume f
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End
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Solo DupRiff Solo-1
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1 Ab
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2 Fm
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3 Bbm
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4 Eb7 / z
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//////////// Song continues ......
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A few points to look at and remember:
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- Octave settings have no effect on Riff Solo data entered with MIDI note values. So, the octave settings in Solo and Solo-1 have no effect.
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- Use of DupRiff saves a lot of time!
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- The HarmonyOnly track notes are in the same octave at the Solo. We could have done 2 different imports, but it's not really necessary since we have lots of harmony choices.
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- I added "~" to the generated RIFF lines to turn off the long note warnings.
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There you go. Sounds a lot more complicated than it is. Try a few songs on your own. My creation is in the example song distro as "summer-knows.mma".
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bvdp July/2010
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