| Portability | requires multi-parameter type classes |
|---|---|
| Stability | provisional |
| Maintainer | synthesizer@henning-thielemann.de |
Synthesizer.Plain.Filter.Recursive.Butterworth
Description
Butterworth lowpass and highpass
- sineListSlow :: C a => a -> [a]
- sineListFast :: C a => a -> [a]
- sineList :: C a => a -> [a]
- makeSines :: C a => Int -> [a]
- partialRatio :: C a => Int -> a -> a
- partialParameter :: C a => a -> a -> a -> Parameter a
- partialParameterInstable :: C a => a -> a -> a -> Parameter a
- type Parameter a = Parameter a
- parameter :: (C a, Storable a) => Passband -> Int -> Pole a -> Parameter a
- modifier :: (C a, C a v, Storable a, Storable v) => Int -> Simple (State v) (Parameter a) v v
- causal :: (C a, C a v, Storable a, Storable v) => Int -> T (Parameter a, v) v
- checkedHalf :: String -> Int -> Int
- runPole :: (C a, C a v) => Passband -> Int -> T a -> T a -> T v -> T v
- causalPole :: (C a, C a v) => Passband -> Int -> T (Pole a, v) v
- highpassCausalPole :: (C a, C a v) => Int -> T (Pole a, v) v
- lowpassCausalPole :: (C a, C a v) => Int -> T (Pole a, v) v
- highpassPole :: (C a, C a v) => Int -> T a -> T a -> T v -> T v
- lowpassPole :: (C a, C a v) => Int -> T a -> T a -> T v -> T v
Documentation
sineListSlow :: C a => a -> [a]Source
sineListFast :: C a => a -> [a]Source
partialRatio :: C a => Int -> a -> aSource
partialParameter :: C a => a -> a -> a -> Parameter aSource
partialParameterInstable :: C a => a -> a -> a -> Parameter aSource
use second order filter parameters for control
checkedHalf :: String -> Int -> IntSource
directly use frequency as control parameter
runPole :: (C a, C a v) => Passband -> Int -> T a -> T a -> T v -> T vSource
When called as runPole kind order ratio freqs,
the filter amplifies frequency 0 with factor 1
and frequency freq with factor ratio.
It uses the frequency and ratio information directly and thus cannot benefit from efficient parameter interpolation (asynchronous run of a ControlledProcess.