refactor: format code

SoundGen/Program.fs

@@ -10,39 +10,70 @@ let attackMs = 100.
 
 let getHzBySemitones semi =
     pitchStandard * (2. ** (1. / 12.)) ** semi
-let getSemitonesByNote (str:string) =
+
+let getSemitonesByNote (str: string) =
     let defaultOctave = 4
-    let notes = ["A"; "A#"; "B"; "C"; "C#"; "D"; "D#"; "E"; "F"; "F#"; "G"; "G#" ] |> List.toArray
+
-    let octave = str.Substring(str.Length - 1) |> int
+    let notes =
-    let noteShift = Array.findIndex (fun e -> e = str.Substring(0, str.Length - 1)) notes
+        [ "A"
+          "A#"
+          "B"
+          "C"
+          "C#"
+          "D"
+          "D#"
+          "E"
+          "F"
+          "F#"
+          "G"
+          "G#" ]
+        |> List.toArray
+
+    let octave =
+        str.Substring(str.Length - 1) |> int
+
+    let noteShift =
+        Array.findIndex (fun e -> e = str.Substring(0, str.Length - 1)) notes
+
     (octave - defaultOctave - 1) * 12 + noteShift
 
 let toInt16Sample sample = sample |> (*) 32767. |> int16
 
 let freq hz duration =
-    let samples = seq { 0.0..(duration * sampleRate) }
+    let samples =
+        seq { 0.0 .. (duration * sampleRate) }
+
     let attack =
-        let samplesToRise = (sampleRate * (0.001 * attackMs));
+        let samplesToRise =
+            (sampleRate * (0.001 * attackMs))
+
         let risingDelta = 1. / samplesToRise
         let mutable i = 0.
-        seq {   while true do 
+
+        seq {
+            while true do
                 i <- i + risingDelta
                 yield min i 1.
         }
 
-    let output = Seq.map
+    let output =
-                    (fun x -> x
+        Seq.map
+            (fun x ->
+                x
                 |> (*) (2. * System.Math.PI * hz / sampleRate)
                 |> sin
-                              |> (*) volume
+                |> (*) volume)
-                              )
             samples
 
     let adsrLength = Seq.length output
-    let attackArray = attack |> Seq.take adsrLength
+
+    let attackArray =
+        attack |> Seq.take adsrLength
+
     let release = Seq.rev attackArray
+
     Seq.zip3 release attackArray output
-    |> Seq.map (fun (x, y, z) -> (x * y * z) |> toInt16Sample)
+    |> Seq.map (fun (x, y, z) -> (x * y * z))
 
 
 let note semitone beats =
@@ -50,9 +81,7 @@ let note semitone beats =
     freq hz (beats * beatDuration)
 
 let song =
-    [
+    [ note 3 0.5
-     //
-     note 3 0.5
       note 3 0.5
       note 15 0.5
       note 15 0.5
@@ -90,13 +119,15 @@ let song =
       note (-2) 0.5
       note (-2) 0.5
       note 10 0.5
-     note 15 0.5
+      note 15 0.5 ]
-     //
+    |> Seq.concat
-     ] |> Seq.concat 
+
+let pack (d: int16 []) =
+    let stream = new MemoryStream()
+
+    let writer =
+        new BinaryWriter(stream, System.Text.Encoding.ASCII)
 
-let pack (d:int16[]) = 
-    let stream = new MemoryStream();
-    let writer = new BinaryWriter(stream, System.Text.Encoding.ASCII);
     let dataLength = Array.length d * 2
 
     // RIFF
@@ -118,24 +149,20 @@ let pack (d:int16[]) =
     // data
     writer.Write(System.Text.Encoding.ASCII.GetBytes("data"))
     writer.Write(dataLength)
-    let data:byte[] = Array.zeroCreate dataLength
+
+    let data: byte [] =
+        Array.zeroCreate dataLength
+
     System.Buffer.BlockCopy(d, 0, data, 0, dataLength)
     writer.Write(data)
     stream
 
-let write (ms:MemoryStream) =
+let write (ms: MemoryStream) =
-    use fs = new FileStream(Path.Combine(__SOURCE_DIRECTORY__,"test.wav"), FileMode.Create)
+    use fs =
+        new FileStream(Path.Combine(__SOURCE_DIRECTORY__, "test.wav"), FileMode.Create)
+
     ms.WriteTo(fs)
 
-song |> Seq.toArray |> pack |> write
+song |> Seq.map (fun x -> x |> toInt16Sample) |> Seq.toArray |> pack |> write
-
-
-
-
-// let drawWave(freq, duration) =
-//     Chart.Line(seq { 1. .. (duration * sampleRate) }, sound)
-//     |> Chart.saveHtml("chart.html")
-// drawWave(440., 1.)
-