Music.Time.Behavior

Behaviors, or time-varying values.

Behavior type

data Behavior a

A Behavior is a value varying over time.

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Instances

Monad Behavior

Functor Behavior

Typeable1 Behavior

Applicative Behavior

Distributive Behavior

Representable Behavior

HasBackendNote Midi a => HasBackendNote Midi (Behavior a)

HasBackendNote SuperCollider a => HasBackendNote SuperCollider (Behavior a)

HasBackendNote Lilypond a => HasBackendNote Lilypond (Behavior a)

HasBackendNote MusicXml a => HasBackendNote MusicXml (Behavior a)

Enum a => Enum (Behavior a)

Eq a => Eq (Behavior a)

Floating a => Floating (Behavior a)

Fractional a => Fractional (Behavior a)

Num a => Num (Behavior a)

Ord a => Ord (Behavior a)

Real a => Real (Behavior a)

Show (Behavior a)

Monoid a => Monoid (Behavior a)

Semigroup a => Semigroup (Behavior a)

VectorSpace a => VectorSpace (Behavior a)

IsDynamics a => IsDynamics (Behavior a)

IsPitch a => IsPitch (Behavior a)

IsInterval a => IsInterval (Behavior a)

Augmentable a => Augmentable (Behavior a)

Alterable a => Alterable (Behavior a)

AffineSpace a => AffineSpace (Behavior a)

AdditiveGroup a => AdditiveGroup (Behavior a)

Transformable (Behavior a)

Reversible (Behavior a)

Tiable a => Tiable (Behavior a)

(Transformable a, Transformable b, ~ * b (Pitch b)) => HasPitches (Behavior a) b

(Transformable a, Transformable b, ~ * b (Pitch b)) => HasPitch (Behavior a) b

(Transformable a, Transformable b, ~ * b (Dynamic b), ~ * (SetDynamic (Behavior a) b) (Behavior a)) => HasDynamics (Behavior a) b

(Transformable a, Transformable b, ~ * b (Dynamic b), ~ * (SetDynamic (Behavior a) b) (Behavior a)) => HasDynamic (Behavior a) b

(HasPart a a, HasPart a b) => HasParts (Behavior a) (Behavior b)

(HasPart a a, HasPart a b) => HasPart (Behavior a) (Behavior b)

Examples

behavior :: Iso (Time -> a) (Time -> b) (Behavior a) (Behavior b)

View a behavior as a time function and vice versa.

Note that this is just an alias defined to make the documentation nicer:

 behavior = tabulated

Combinators

switch :: Time -> Behavior a -> Behavior a -> Behavior a

Instantly switch from one behavior to another.

switch' :: Time -> Behavior a -> Behavior a -> Behavior a -> Behavior a

Instantly switch from one behavior to another with an optinal intermediate value.

trimBefore :: Monoid a => Time -> Behavior a -> Behavior a

Replace everthing before the given time by mempty.

trimAfter :: Monoid a => Time -> Behavior a -> Behavior a

Replace everthing after the given time by mempty.

Common behaviors

Oscillators

line :: Fractional a => Behavior a

A behavior that gives the current time, i.e. the identity function

Should really have the type Behavior Time, but is provided in a more general form for convenience.

sawtooth :: RealFrac a => Behavior a

A behavior that goes from 0 to 1 repeatedly with a period of 1.

sine :: Floating a => Behavior a

A behavior that

cosine :: Floating a => Behavior a

A behavior that

Impulse functions

unit :: Fractional a => Behavior a

A behavior that varies from 0 to 1 during the same time interval and is 0 before and 1 after that interval.

impulse :: Num a => Behavior a

A behavior that is 1 at time 0, and 0 at all other times.

turnOn :: Num a => Behavior a

A behavior that goes from 0 to 1 at time 0.

turnOff :: Num a => Behavior a

A behavior that goes from 1 to 0 at time 0.