LambdaSound.Note

This module has some functions to use sound notation concepts like semitones for pitch and quarternotes for duration

Semitones

newtype Semitone

Semitones are tones like c4, d4 or c5. The semitone is used to determine the hz of the tone based on pitchStandard

Constructors

Semitone Int

Instances

Enum Semitone

Defined in LambdaSound.Note

Methods

succ :: Semitone -> Semitone

pred :: Semitone -> Semitone

toEnum :: Int -> Semitone

fromEnum :: Semitone -> Int

enumFrom :: Semitone -> [Semitone]

enumFromThen :: Semitone -> Semitone -> [Semitone]

enumFromTo :: Semitone -> Semitone -> [Semitone]

enumFromThenTo :: Semitone -> Semitone -> Semitone -> [Semitone]

Num Semitone

Defined in LambdaSound.Note

Methods

(+) :: Semitone -> Semitone -> Semitone

(-) :: Semitone -> Semitone -> Semitone

(*) :: Semitone -> Semitone -> Semitone

negate :: Semitone -> Semitone

abs :: Semitone -> Semitone

signum :: Semitone -> Semitone

fromInteger :: Integer -> Semitone

Show Semitone

Defined in LambdaSound.Note

Methods

showsPrec :: Int -> Semitone -> ShowS

show :: Semitone -> String

showList :: [Semitone] -> ShowS

Eq Semitone

Defined in LambdaSound.Note

Methods

(==) :: Semitone -> Semitone -> Bool

(/=) :: Semitone -> Semitone -> Bool

Ord Semitone

Defined in LambdaSound.Note

Methods

compare :: Semitone -> Semitone -> Ordering

(<) :: Semitone -> Semitone -> Bool

(<=) :: Semitone -> Semitone -> Bool

(>) :: Semitone -> Semitone -> Bool

(>=) :: Semitone -> Semitone -> Bool

max :: Semitone -> Semitone -> Semitone

min :: Semitone -> Semitone -> Semitone

pitchStandard :: Hz

440 Hz is used at the pitch standard for the tone a4

semitoneToHz :: Semitone -> Hz

Converts a semitone to the appropriate frequency based on pitchStandard

raiseSemitones :: Int -> Sound d Pulse -> Sound d Pulse

Raise a sound by the given amount of semitones. This only works for sounds which use the period length given in the compute step of the sound. sineWave works but noise does not.

For example:

raiseSemitones 2 (asNote pulse c3) = asNote pulse d3

diminishSemitones :: Int -> Sound d Pulse -> Sound d Pulse

Diminishes a sound by the given amount of semitones

asNote :: (Hz -> a) -> Semitone -> a

Transforms a function taking a Hz to one taking a Semitone. Should be used like the following:

asNote sineWave c4

c1 :: Semitone

d1 :: Semitone

e1 :: Semitone

f1 :: Semitone

g1 :: Semitone

a1 :: Semitone

b1 :: Semitone

c2 :: Semitone

d2 :: Semitone

e2 :: Semitone

f2 :: Semitone

g2 :: Semitone

a2 :: Semitone

b2 :: Semitone

c3 :: Semitone

d3 :: Semitone

e3 :: Semitone

f3 :: Semitone

g3 :: Semitone

a3 :: Semitone

b3 :: Semitone

c4 :: Semitone

d4 :: Semitone

e4 :: Semitone

f4 :: Semitone

g4 :: Semitone

a4 :: Semitone

b4 :: Semitone

c5 :: Semitone

d5 :: Semitone

e5 :: Semitone

f5 :: Semitone

g5 :: Semitone

a5 :: Semitone

b5 :: Semitone

c6 :: Semitone

d6 :: Semitone

e6 :: Semitone

f6 :: Semitone

g6 :: Semitone

a6 :: Semitone

b6 :: Semitone

c7 :: Semitone

d7 :: Semitone

e7 :: Semitone

f7 :: Semitone

g7 :: Semitone

a7 :: Semitone

b7 :: Semitone

Notes

wholeNote :: Duration

These are durations for the corresponding note lenghts assuming 60 bpm.

If you know that a sound has 60 bpm, you can easily scale to different bpm with scaleDuration:

scaleDuration (wantedBPM / 60) soundWith60BPM

halfNote :: Duration

These are durations for the corresponding note lenghts assuming 60 bpm.

If you know that a sound has 60 bpm, you can easily scale to different bpm with scaleDuration:

scaleDuration (wantedBPM / 60) soundWith60BPM

quarterNote :: Duration

These are durations for the corresponding note lenghts assuming 60 bpm.

If you know that a sound has 60 bpm, you can easily scale to different bpm with scaleDuration:

scaleDuration (wantedBPM / 60) soundWith60BPM

eightNote :: Duration

These are durations for the corresponding note lenghts assuming 60 bpm.

If you know that a sound has 60 bpm, you can easily scale to different bpm with scaleDuration:

scaleDuration (wantedBPM / 60) soundWith60BPM