synthesizer-0.2: Audio signal processing coded in Haskell Source code Contents Index

Synthesizer.State.Control Portability requires multi-parameter type classes Stability provisional Maintainer synthesizer@henning-thielemann.de

Contents Control curve generation piecewise curves auxiliary functions

Description

Synopsis

constant :: a -> T a linear :: C a => a -> a -> T a linearMultiscale :: C y => y -> y -> T y linearMultiscaleNeutral :: C y => y -> T y line :: C y => Int -> (y, y) -> T y exponentialMultiscale :: C a => a -> a -> T a exponential :: C a => a -> a -> T a exponentialMultiscaleNeutral :: C y => y -> T y exponential2Multiscale :: C a => a -> a -> T a exponential2 :: C a => a -> a -> T a exponential2MultiscaleNeutral :: C y => y -> T y exponentialFromToMultiscale :: C y => y -> y -> y -> T y exponentialFromTo :: C y => y -> y -> y -> T y vectorExponential :: (C a, C a v) => a -> v -> T v vectorExponential2 :: (C a, C a v) => a -> v -> T v cosine :: C a => a -> a -> T a cubicHermite :: C a => (a, (a, a)) -> (a, (a, a)) -> T a splitDurations :: C t => [t] -> [(Int, t)] piecewise :: C a => T a a (a -> T a) -> T a type Piece a = Piece a a (a -> T a) stepPiece :: Piece a linearPiece :: C a => Piece a exponentialPiece :: C a => a -> Piece a cosinePiece :: C a => Piece a cubicPiece :: C a => a -> a -> Piece a curveMultiscale :: (y -> y -> y) -> y -> y -> T y curveMultiscaleNeutral :: (y -> y -> y) -> y -> y -> T y

Control curve generation

constant :: a -> T a Source

linear Source

:: C a => a steepness -> a initial value -> T a linear progression

linearMultiscale :: C y => y -> y -> T y Source

As stable as the addition of time values.

linearMultiscaleNeutral :: C y => y -> T y Source

Linear curve starting at zero.

line Source

:: C y => Int length -> (y, y) initial and final value -> T y linear progression Linear curve of a fixed length. The final value is not actually reached, instead we stop one step before. This way we can concatenate several lines without duplicate adjacent values.

exponentialMultiscale Source

:: C a => a time where the function reaches 1/e of the initial value -> a initial value -> T a exponential decay

exponential Source

:: C a => a time where the function reaches 1/e of the initial value -> a initial value -> T a exponential decay

exponentialMultiscaleNeutral Source

:: C y => y time where the function reaches 1/e of the initial value -> T y exponential decay

exponential2Multiscale Source

:: C a => a half life -> a initial value -> T a exponential decay

exponential2 Source

:: C a => a half life -> a initial value -> T a exponential decay

exponential2MultiscaleNeutral Source

:: C y => y half life -> T y exponential decay

exponentialFromToMultiscale Source

:: C y => y time where the function reaches 1/e of the initial value -> y initial value -> y value after given time -> T y exponential decay

exponentialFromTo Source

:: C y => y time where the function reaches 1/e of the initial value -> y initial value -> y value after given time -> T y exponential decay

vectorExponential Source

:: (C a, C a v) => a time where the function reaches 1/e of the initial value -> v initial value -> T v exponential decay This is an extension of exponential to vectors which is straight-forward but requires more explicit signatures. But since it is needed rarely I setup a separate function.

vectorExponential2 Source

:: (C a, C a v) => a half life -> v initial value -> T v exponential decay

cosine Source

:: C a => a time t0 where 1 is approached -> a time t1 where -1 is approached -> T a a cosine wave where one half wave is between t0 and t1

cubicHermite :: C a => (a, (a, a)) -> (a, (a, a)) -> T a Source

piecewise curves

splitDurations :: C t => [t] -> [(Int, t)] Source

piecewise :: C a => T a a (a -> T a) -> T a Source

type Piece a = Piece a a (a -> T a) Source

stepPiece :: Piece a Source

linearPiece :: C a => Piece a Source

exponentialPiece :: C a => a -> Piece a Source

cosinePiece :: C a => Piece a Source

cubicPiece :: C a => a -> a -> Piece a Source

auxiliary functions

curveMultiscale :: (y -> y -> y) -> y -> y -> T y Source

curveMultiscaleNeutral :: (y -> y -> y) -> y -> y -> T y Source

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