Sound.SC3.Lang.Control.Duration

The SC3 duration model.

Duration

class Duration d where

There are three parts to a duration:

delta is the logical or notated duration.

occ is the sounding duration, the interval that a value actually occupies in time. If occ < delta there will be a hole, if occ > delta there will be an overlap.

fwd is the forward duration, the interval to the start time of the next value in the sequence, which may be parallel to the current value. Ordinarily fwd is either delta or 0.

Minimal complete definition

delta

Methods

delta :: d -> Double

occ :: d -> Double

fwd :: d -> Double

Instances

Duration Double

Duration Float

Duration Int

Duration Integer

Duration Dur

Integral i => Duration (Ratio i)

duration :: Duration d => d -> (Double, Double, Double)

Composite of delta, occ, and fwd.

Dur

data Dur

Variant of the SC3 Duration model.

delta (defaultDur {dur = 2,stretch = 2}) == 4
occ defaultDur == 0.8
let d = defaultDur {fwd' = Just 0} in (delta d,fwd d) == (1,0)

Constructors

Dur

Fields

tempo :: Double

Tempo (in pulses per minute)

dur :: Double

Duration (in pulses)

stretch :: Double

Stretch multiplier

legato :: Double

Legato multipler

sustain' :: Maybe Double

Sustain time

delta' :: Maybe Double

Delta time

lag :: Double

Lag value

fwd' :: Maybe Double

Possible non-sequential delta time field

Instances

Eq Dur

Show Dur

Duration Dur

defaultDur :: Dur

Default Dur value, equal to one second.

delta defaultDur == 1

OptDur

type T8 n = (n, n, n, n, n, n, n, n)

Eight tuple.

type OptDur = T8 (Maybe Double)

Dur represented as an eight-tuple of optional values.

optDur :: OptDur -> Dur

Translate OptDur to Dur.