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| Synopsis |
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| Sound Generators |
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| osc |
| :: [Double] | The sound to play. Output will be finite if sound is finite. | | -> [Double] | Speed, 1.0 = normal,
0.0 < X < 1.0 = slower resp. lower,
1.0 < X = faster resp. higher,
X < 0.0 => X = abs X. | | -> [Double] | Output | | Play given sound with variable speed resp. frequency.
(General definition: Usually a frequency of 1.0 means a period of 1024 values).
Use scratchSample or scratchSampleSignal for backward playing. |
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| sinus :: [Double] -> [Double] |
| A sinus wave generator with a period of 1024/N for frequency N |
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| cosinus :: [Double] -> [Double] |
| A cosinus wave generator |
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| rect :: [Double] -> [Double] |
| A rectangle wave generator |
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| saw :: [Double] -> [Double] |
| A sawtooth wave generator |
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| tri :: [Double] -> [Double] |
| A triangle wave generator |
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| randomList :: (Random a) => (a, a) -> [a] |
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| Functions for Lists |
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| sampleAndHold :: (Ord a, Num a) => b -> [a] -> [b] -> [b] |
| Current output value is repeatet until the first list argument value switches from zero or below
to a non-zero positive value, the actual value of the second list argument is then taken for output. |
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| average :: (Fractional a) => Int -> [a] -> [a] |
| Maps the values to the average of the last N values (including the actual) |
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| terminateAt :: Int -> (a -> Bool) -> [a] -> [a] |
| If predicate holds for N elements, list is cut. |
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| follow :: Double -> [Double] -> [Double] -> [Double] |
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| Functions for single values |
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| These Functions can be used with map: |
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| compress :: Double -> Double -> Double |
compress p x = x / (abs p + abs x) |
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| noteToFrequency |
| :: Double | Base, | | -> Double | Notenumber | | -> Double | 2 ^ (Notenumber / Base) | | Transforms a notevalue into a frequency. A Notevalue of 0.0 means a frequency of 1.0. |
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| adjustFrequency |
| :: Double | Period | | -> Double | New Frequency (Hz) for old frequency of 1.0 | | -> Double | Input Frequency | | -> Double | Output Frequency | | Adjusts the frequency. If given oscillator has period X for frequency of 1.0 and you want it to
produce a wave with Y Hz at frequency of 1.0, use map (adjustFrequency X Y) to adjust the
input of the oscillator. |
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| Other Functions |
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| These Functions are not simple (i. e. linear) list transformers: |
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| splitWaves :: [Double] -> [[Double]] |
| Splits a wave into parts. they are split when a value equal or less than zero is followed by a
value greater than zero. |
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| crossfade |
| :: [Double] | w1 | | -> [Double] | w2 | | -> [Double] | result | | Create a wave with the beginning of w1, the ending of w2 and the length of the longer one of them. |
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| Produced by Haddock version HADDOCK_VERSION |
