tabr 0.3.0 on CRAN

July 2, 2019
By

(This article was first published on Matt's R Blog, and kindly contributed to R-bloggers)

The tabr package for creating guitar tablature (“tabs”) from R code is now available on CRAN. tabr provides programmatic music notation and a wrapper around LilyPond for creating quality guitar tablature.

This post is just a quick update to mention that v0.3.0 has now been released on CRAN. And since I don’t have much time for blogging, I’m basically just pasting the release notes here below.

But the key changes are these:

  • Make fretbaord plots with ggplot.
  • Much more robust note/phrase/chord syntax validation.
  • A collection of music programming functions have been added for more easily transforming among scales, modes, keys, chords, notes, etc.
  • Custom print methods that use a splash of color.
  • A table containing thousands of guitar chords and associated functions for mapping chords.
  • A bunch more vignettes! Yay, happy vignettes!
  • Bug fixes

tabr 0.3.0 release notes

  • Added fretboard_plot for making fretboard diagrams outside of the LilyPond tablature pipeline. This necessitates importing ggplot2.
  • Added functions for phrase validation, coercion and decomposition back to original character string inputs.
  • Added functions for note, pitch, chord and octave equivalence checks.
  • Added a collection of functions for constructing and working with common chords. The chord constructors are among the chord_*-named functions and also have shorter x*-named aliases. These are “piano chords,” i.e., based on the condensed, defining intervals.
  • Added guitarChords dataset containing several thousand formations of guitar chord voicings.
  • Added helper functions that use guitarChords for obtaining guitar chord information and mapping between different defining properties of a chord, most notably the addition of gc_notes and gc_fretboard for mapping chord names to noteworthy strings and fretboard diagram syntax.
  • Added helper functions for working with basic note/pitch strings.
  • Added helper functions for working with musical scales and modes.
  • Added helper functions for working with musical intervals.
  • Added noteworthy class, used internally, optional for users (includes custom print and summary methods).
  • Added mainIntervals dataset.
  • Added more internal checks of note and chord syntax validity across functions that work with string representations (pre-phrase object construction).
  • Update older functions to utilize the new, more robust and stricter validation checks and offer more consistent noteworthy class output.
  • updated transpose to handle additional edge cases, including a new style option, strip.
  • Updated and added new unit tests.
  • Bug fix for case where NA-valued no-chord rests (s or r) were unnamed in output of chord_set.
  • Fixed entry in tabrSyntax.
  • Fix class assignment bug and updated as_phrase.
  • Added a new column of relative interval size to internal .keydata helper table.
  • Added new vignettes focusing on the programming aspect of tabr.
  • Updated documentation.

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