NAME

Music::Duration - Add 32nd, 64th, fractional and tuple durations to MIDI-Perl

VERSION

version 0.0503

SYNOPSIS

  # Compare:
  # perl -MMIDI::Simple -MData::Dumper -e'$Data::Dumper::Sortkeys=1; print Dumper \%MIDI::Simple::Length'
  # perl -MMusic::Duration -MData::Dumper -e'$Data::Dumper::Sortkeys=1; print Dumper \%MIDI::Simple::Length'

  # In a program:
  use MIDI::Simple;
  use Music::Duration;
  Music::Duration::fractional('z', 5);
  # Create and set up a new_score, then for example:
  n('zsn', 'n38') for 1 .. 5;
  Music::Duration::tuple( 'qn', 'z', 5 );
  n('zqn', 'n38') for 1 .. 5;

DESCRIPTION

This module adds thirty-second and sixty-fourth note divisions to MIDI::Simple. These are 32nd: yn, dyn, ddyn, tyn and 64th: xn, dxn, ddxn, txn.

Also, this module allows the addition of non-standard note divisions with the fractional() and tuple() functions, detailed below.

FUNCTIONS

fractional()

  Music::Duration::fractional( 'z', 5 )
  # Then: $score->n( 'zqn', ... );

Add a fractional division to the MIDI::Simple Length hash. This allows the use of a time signature that is not 4/4 or 3/4.

For a given name of 'z', this function adds the following durations:

  zwn
  zhn
  zqn
  zen
  zsn
  zyn
  zxn

For the example of 5 divisions, this means that a whole note is 5 beats long. The duration for each division is "half as long as the last." So a half note is 2.5 beats long, and a quarter note is, you guessed it - 1.25. See the distribution test for the full breakdown.

tuple()

  Music::Duration::tuple( 'wn', 'z', 5 );
  # Then: $score->n( 'zwn', ... );

Add a fractional division for a given duration of the MIDI::Simple Length hash.

Musically, this creates a "cluster" of notes in place of the given duration.

So instead of a whole note of four beats, we instead play 5 beats. A triplet is a 3-tuple.

TO DO

Add dot, double-dot and triplet to the fractional durations.

SEE ALSO

The "Parameters for n/r/noop" section in MIDI::Simple

The code in the t/ directory

AUTHOR

Gene Boggs <gene@cpan.org>

COPYRIGHT AND LICENSE

This software is copyright (c) 2018 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.

cpanm Music::Duration

perl -MCPAN -e shell
install Music::Duration