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package MIDI::Drummer::Tiny::Tutorial::Advanced;
__END__
HideShow 226 lines of Pod
=pod
=encoding UTF-8
=head1 NAME
MIDI::Drummer::Tiny::Tutorial::Advanced
=head1 VERSION
version 0.5012
=head1 Advanced Grooves
=head2 Cold Sweat (Clyde Stubblefield)
  my $accent = 30;
  for my $n (1 .. $d->bars) {
      $d->note($d->eighth, $d->closed_hh, $d->kick);
      $d->note($d->eighth, $d->closed_hh);
      $d->note($d->eighth, $d->closed_hh, $d->snare);
      $d->note($d->sixteenth, $d->closed_hh);
      $d->accent_note($accent, $d->sixteenth, $d->snare);
      $d->note($d->sixteenth, $d->closed_hh);
      $d->accent_note($accent, $d->sixteenth, $d->snare);
      $d->note($d->eighth, $d->open_hh, $d->kick);
      $d->note($d->eighth, $d->pedal_hh);
      $d->note($d->eighth, $d->closed_hh, $d->snare);
      $d->note($d->sixteenth, $d->closed_hh);
      $d->accent_note($accent, $d->sixteenth, $d->snare);
      $d->note($d->eighth, $d->closed_hh, $d->kick);
      $d->note($d->eighth, $d->closed_hh, $d->snare);
      $d->note($d->sixteenth, $d->closed_hh);
      $d->accent_note($accent, $d->sixteenth, $d->snare);
      $d->note($d->sixteenth, $d->closed_hh);
      $d->accent_note($accent, $d->sixteenth, $d->snare);
      $d->note($d->eighth, $d->closed_hh, $d->kick);
      $d->note($d->eighth, $d->closed_hh, $d->snare);
      $d->note($d->eighth, $d->closed_hh);
  }
=head2 Fool in the Rain (John Bonham)
  my ($min, $max) = (30, 127);
  for my $n (1 .. $d->bars) {
      $d->note($d->triplet_eighth, $d->closed_hh, $d->kick);
      $d->rest($d->triplet_eighth);
      $d->note($d->triplet_eighth, $d->open_hh, $d->kick);
      $d->note($d->triplet_eighth, $d->pedal_hh);
      $d->accent_note($min, $d->triplet_eighth, $d->snare);
      $d->note($d->triplet_eighth, $d->closed_hh, $d->kick);
      $d->accent_note($max, $d->triplet_eighth, $d->snare);
      $d->rest($d->triplet_eighth);
      $d->note($d->triplet_eighth, $d->closed_hh);
      $d->note($d->triplet_eighth, $d->closed_hh);
      $d->accent_note($min, $d->triplet_eighth, $d->snare);
      $d->note($d->triplet_eighth, $d->closed_hh, $d->kick);
  }
=head2 The Purdie Shuffle (Bernard Purdie)
  my $accent = 30;
  for my $n (1 .. $d->bars) {
      $d->note($d->triplet_eighth, $d->closed_hh, $d->kick);
      $d->accent_note($accent, $d->triplet_eighth, $d->snare);
      $d->note($d->triplet_eighth, $d->closed_hh);
      $d->note($d->triplet_eighth, $d->closed_hh);
      $d->accent_note($accent, $d->triplet_eighth, $d->snare);
      $d->note($d->triplet_eighth, $d->closed_hh, $d->kick);
      $d->note($d->triplet_eighth, $d->closed_hh, $d->snare);
      $d->accent_note($accent, $d->triplet_eighth, $d->snare);
      $d->note($d->triplet_eighth, $d->closed_hh);
      $d->note($d->triplet_eighth, $d->closed_hh);
      $d->accent_note($accent, $d->triplet_eighth, $d->snare);
      $d->note($d->triplet_eighth, $d->closed_hh, $d->kick);
  }
=head2 The Black Page (Frank Zappa)
This is an exercise for the reader. It is one of the most advanced
grooves ever. It makes use of a number of "tuplets". For instance: a
half note triplet duration with groups of 5 notes for quarter notes
within. Oof!
Please see this
L<long program|https://github.com/ology/MIDI-Drummer-Tiny/blob/master/eg/black-page>,
which is in the F<eg/> directory of this distribution.
=head1 Utility Method
=head2 sync()
This method is identical to the MIDI score method. It's just a
convenient wrapper for the drummer, as shown below.
=head1 Beat-string Patterns
=head2 pattern()
If bit-strings are considered to be beats (C<1> for a note-on strike
and C<0> for no strike), then we shall call them "beat-strings." :)
  $d->pattern(
      patterns   => [qw( 0101 0101 0110 0110 )],
      instrument => $d->snare,
      %options,
  );
The options and their defaults are the following:
  duration: quarter-note
  beats:    given by constructor
  repeat:   1
  negate:   0 (flip the bit values)
  vary:     {
      0 => sub { $self->rest( $args{duration} ) },
      1 => sub { $self->note( $args{duration}, $args{instrument} ) },
  }
Those are all fairly obvious except for the last "vary" option. This
defines what to do (or not do) given the digit of the beat-string.
For C<0>, we rest - for the given (or default) duration. For C<1>, we
add a note to the score.
This "vary" option can be made up on the fly, by the caller. We can
therefore provide different behaviors to perform, when this method is
called.
Now the string doesn't need to contain only ones and zeros. The string
could have a C<2> in it! The "vary" would then need to contain a C<2>
key, with instructions for what to do - like roll, possibly.
=head2 sync_patterns()
Ok. That's fine for a single voice. But more often we want to
multitrack different parts simultaneously. Enter the C<sync_patterns>
method.
  $d->sync_patterns(
      $d->open_hh => [ '11111111') ],
      $d->snare   => [ '0101' ],
      $d->kick    => [ '1010' ],
  ) for 1 .. $d->bars;
The hi-hat is 8 beats long. The kick and snare are 4 beats each. This
means that the kick and snare are quarter notes, and the hi-hat will
be treated as eighth notes, because a "common multiple" is computed.
=head2 sync() Revisited
For finer-grain control, you should use the above C<pattern> method
combined with the C<sync> method:
  $d->sync(
    sub { $d->pattern(
        instrument => $d->closed_hh,
        patterns   => [ '11111111' ]
    )},
    sub { $d->pattern(
        instrument => $d->snare,
        patterns   => [ $my_pattern->($snare_onset, 16) ]
    )},
    sub { $d->pattern(
        instrument => $d->kick,
        patterns   => [ $my_pattern->($kick_onset, 16) ]
    )},
  ) for 1 .. $d->bars - 1;
Why C<bars - 1>? Because next up is a one measure fill!
What is C<my_pattern>? That is an imaginary routine that takes a
number of onsets and a total number of beats; much like the C<euclid>
function in the
L<CreatingRhythms|https://metacpan.org/pod/Music::CreatingRhythms>
module. Hint hint. ;)
=head1 Fills
This is a work in progress, and is tricky to get right... It uses
beat-stings:
  $d->add_fill(
      sub { # this is the fill itself
          my $self = shift;
          return {
            duration         => 16, # a 16-beat fill
            $self->closed_hh => '00000000',
            $self->snare     => '11111111',
            $self->kick      => '10001000',
          };
      },
      # the phrase to play before the fill
      $d->closed_hh => [ '11111111' ],
      $d->snare     => [ '0101' ],
      $d->kick      => [ '1010' ],
  );
=head1 AUTHOR
Gene Boggs <gene.boggs@gmail.com>
=head1 COPYRIGHT AND LICENSE
This software is copyright (c) 2014-2025 by Gene Boggs.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
=cut