grid: Drum-machine grid representation of rhythmic durations.

In Computational-Cognitive-Musicology-Lab/humdrumR: humdrumR

Drum-machine grid representation of rhythmic durations.

Description

These functions read and write a sequencer-like representation of rhythm. Rhythms are represented as either strings or vectors of "on"/"off" values, which indicate where rhythmic onsets occur in a regular time grid. For example, "X00X00X0" or c(1, 0, 0, 1, 0, 0, 1, 0).

If grid() is applied to a humdrumR data class you may use the data's fields as arguments. If no field names are specified, the first selectedField is used as x.

Usage

## Default S3 method:
grid(x, ..., parseArgs = list(), scale = 1, unit = 1, inPlace = FALSE)

humData |> select(Token) |> grid() 
humData |> grid(Token)

grid(x, ..., parseArgs = list(), scale = 1, unit = 1, inPlace = FALSE)

togrid(
  x,
  tick = tatum(x),
  measure = "1",
  on = "X",
  off = "O",
  collapse = TRUE,
  sep = ""
)

fromgrid(x, tick, meter)

## S3 method for class 'matrix'
fromgrid(x, tick = "16")

## S3 method for class 'character'
fromgrid(x, tick = "16", on = "X", off = "O", sep = "", deparser = recip, ...)

## S3 method for class 'logical'
fromgrid(x, tick = "16", deparser = rint2recip, ...)

## S3 method for class 'numeric'
fromgrid(x, tick = "16", deparser = recip, ...)

## S3 method for class 'integer'
fromgrid(x, tick = "16", deparser = recip, ...)

Arguments

x	An input vector. The x argument can be any (atomic) vector, or a rational (rhythmInterval), or NULL. Must be parsable as rhythm infromation.
...	Argments passed to the deparser.
scale	A numeric or rational value which is used as the output unit of measurement. Defaults to rational(1, 1). Must be numeric or rational.
inPlace	Should non-rhythm information be retained in the output string? Defaults to FALSE. Must be a singleton logical value: an on/off switch. Defaults to FALSE. A singleton logical value, or NA. See "Grace notes" section below.
tick	What is the unit of the grid? Defaults to sixteenth-note (fromgrid()) or the tatum() of the x argument. Must be parsed as a rhythm by rhythmInterval().
on, off	What represents onsets (attacks) and rests in the grid? Default to "X" and "O" respectively. Must be singleton atomic values.
collapse	Should the output be collapsed to a single string per measure? Defaults to TRUE. Must be singleton logical value: an on/off switch.
sep	Separator between ticks in collapsed output. Defaults to an empty string (no separator). Must be a singleton character string.
deparser	What output representation should be returned? Defaults to recip(). Must be a function which accepts rational() numbers.

Details

The grid() function, is a fully vectorized rhythm function, which translates individual durations to a grid-representation strings. For example, on a 16th-note grid, a dotted eighth-note would be represented "XOO". The fromgrid() and togrid() functions create/read fuller grid representations, representing whole rhythms at once: in their case, the length of input and output will not be the same.

See Also

To better understand how grid() works, read about the family of rhythm functions, or how rhythms are parsed and deparsed.

Other rhythm functions: duration(), notehead(), recip()

Examples

rhythm <- c('8.', '8.', '8', '8.', '8', '16', '8')

grid(rhythm)

togrid(rhythm, on = '1', off = '0')

togrid(rhythm, collapse = FALSE)

fromgrid('XOXOXOOXXOXOXXOO', tick = '8')

Computational-Cognitive-Musicology-Lab/humdrumR documentation built on Oct. 22, 2024, 9:28 a.m.