Tempo: Create `Tempo` Object

Description

Create a Tempo object to represent a tempo marking.

Usage

Tempo(tempo, unit = NULL, bar = NULL, offset = NULL, marking = NULL)

Value

A list of class Tempo.

Arguments

tempo: A positive number, which indicates the number of quarter notes per minute.
unit: Deprecated. Was used to specify the beat unit. Please use marking instead.
bar: Optional. A positive integer, which indicates the number of the measure where to add the tempo. By default, it will be added at the first measure.
offset: Optional. A non-negative number, which indicates the tempo's position in a measure. The default value is 0.
marking: Optional. A single character, which represents the marking that appears on the score. See the Details section.

Details

The parameter tempo is used to specify the actual playback speed, while marking to represent the marking that appears on the score.

Some examples:

Tempo(50): the playback speed is 50 quarter notes per minute. A marking of "quarter = 50" will be added to the score.
Tempo(50, marking = "Adagio"): the playback speed is 50 quarter notes per minute, while the marking on the score is "Adagio".
Tempo(50, marking = "Adagio half. = 20"): the playback speed is 50 quarter notes per minute, while the marking on the score is "Adagio half. = 20".
Tempo(50, marking = "Adagio (quarter = 45-80)"): you can add a speed range and parentheses to the marking.
Tempo(50, marking = "quarter. = quarter"): you can also indicate metric modulations with marking.

Examples

Run this code

# Create a tempo
tempo <- Tempo(50, marking = "Adagio (half = 25)")
tempo

# Add it to a `Music`
music <- Music() + Meter(4, 4) + Line(c("C4", "D4", "E4", "F4")) + tempo
music

# Generate the music score
if (interactive()) {
  show(music)
}