Added a simple pitch shifter

AcapellaDownloader/AcapellaDownloader.csproj

@@ -38,8 +38,8 @@
     <ApplicationIcon>icon.ico</ApplicationIcon>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="NAudio, Version=1.8.4.0, Culture=neutral, processorArchitecture=MSIL">
-      <HintPath>..\packages\NAudio.1.8.4\lib\net35\NAudio.dll</HintPath>
+    <Reference Include="NAudio, Version=1.10.0.0, Culture=neutral, processorArchitecture=MSIL">
+      <HintPath>..\packages\NAudio.1.10.0\lib\net35\NAudio.dll</HintPath>
     </Reference>
     <Reference Include="Newtonsoft.Json, Version=11.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
       <HintPath>..\packages\Newtonsoft.Json.11.0.2\lib\net45\Newtonsoft.Json.dll</HintPath>

AcapellaDownloader/Form1.cs

@@ -7,19 +7,22 @@
 using System.Threading.Tasks;
 using System.Windows.Forms;
 using NAudio.Wave;
+using NAudio.Wave.SampleProviders;
 
 namespace AcapellaDownloader
 {
     public partial class Form1 : Form
     {
-	    private float VoiceVolume = 1;
-	    private const string _noText = "You did not enter the text";
+	    private float VoiceVolume = 1f;
+	    private float Pitch = 1f;
+        private const string _noText = "You did not enter the text";
 	    private const string _noVoice = "Please select a voice";
 	    public const string downloadError = "A download error has occurred";
 	    public const string downloaded = "Done!";
+	    SmbPitchShiftingSampleProvider PitchProvider;
         public Form1()
         {
-            InitializeComponent();
+	        InitializeComponent();
         }
         private void btnDownload_Click(object sender, EventArgs e)
         {
@@ -30,10 +33,12 @@ private void btnDownload_Click(object sender, EventArgs e)
             var s = dialog.ShowDialog();
             if (s == DialogResult.OK)
             {
-	            using (var web = new WebClient())
-                {
-                    web.DownloadFile(soundLink, dialog.FileName);
-                    MessageBox.Show(downloaded);
+	            using (var mf = new MediaFoundationReader(soundLink))
+	            {
+		            PitchProvider = new SmbPitchShiftingSampleProvider(mf.ToSampleProvider().ToMono());
+		            PitchProvider.PitchFactor = Pitch;
+		            MediaFoundationEncoder.EncodeToMp3(PitchProvider.ToWaveProvider(), dialog.FileName, 48000);
+		            MessageBox.Show(downloaded);
                 }
             }
         }
@@ -99,11 +104,14 @@ void PlaySound(string link, int WaveOutDeviceId)
             using (var wo = new WaveOutEvent())
             {
                 wo.DeviceNumber = WaveOutDeviceId;
-                wo.Init(mf);
+                PitchProvider = new SmbPitchShiftingSampleProvider(mf.ToSampleProvider().ToMono());
+                PitchProvider.PitchFactor = Pitch;
+                wo.Init(PitchProvider);
                 wo.Volume = VoiceVolume;
                 wo.Play();
                 while (wo.PlaybackState == PlaybackState.Playing)
                 {
+	                PitchProvider.PitchFactor = Pitch;
 	                wo.Volume = VoiceVolume;
 	                Thread.Sleep(500);
                 }
@@ -144,5 +152,23 @@ private void slVolume_VolumeChanged(object sender, EventArgs e)
 			VoiceVolume = slVolume.Volume;
 		}
 
+		private void tbPitch_Scroll(object sender, EventArgs e)
+		{
+			if (tbPitch.Value > 11)
+			{
+				Pitch =((tbPitch.Value - 1) / 10f);
+			}
+			else if (tbPitch.Value < 11)
+			{
+				Pitch = (((tbPitch.Value - 1) / 10f * 0.5f) + 0.5f);
+			}
+			else
+			{
+				Pitch = 1f;
+			}
+
+			lbl_pitchValue.Text = Pitch.ToString();
+
+		}
 	}
 }

AcapellaDownloader/packages.config

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="NAudio" version="1.8.4" targetFramework="net461" />
+  <package id="NAudio" version="1.10.0" targetFramework="net461" />
   <package id="Newtonsoft.Json" version="11.0.2" targetFramework="net461" />
 </packages>