Basic Types

Type used to represent beat values in a metrical organization of time.

public typealias Beats = Int

Type used to represent subdivision values in a metrical organization of time.

public typealias Subdivision = Int

A unit of hierarchically-divided symbolic time.

Example Usage

You can create a Duration value with an amount of beats at a given subdivision level.

let _ = Duration(1,4) // => one quarter note
let _ = Duration(3,32) // => three thirty-second notes

You can also create a Duration value with an infix operator:

let _ = 3/>32
let _ = 31/>4

The subdivision value must be a power-of-two, otherwise your program will crash!

let _ = Duration(3,13) // boom

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public struct Duration

Abstract structure of beats which are concretely represented in a measure.

To create a basic meter, it is a simple as:

let common = Meter(4,4)
let waltz = Meter(3,4)
let ferneyhough = Meter(3,12)

A fractional meter can be created like so:

let fractional = Meter(Fraction(3,5),16)

Any number of meters can be combined into an additive meter:

let blueRondo = Meter(2,8) + Meter(2,8) + Meter(2,8) + Meter(3,8)
let czernowinSQm5 = Meter(Meter(1,4),Meter(3,16))

Basic and fractional meters can also be combined:

let czernowinSQm7 = Meter(Meter(1,4),Meter(Fraction(2,3),4))

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public struct Meter

Model of a Tempo.

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public struct Tempo