Initial commit — WPF guitar note name tutor using FFT frequency detection
This commit is contained in:
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using System;
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namespace FrequencyDetection
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{
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public class FrequencyDetectedEventArgs : EventArgs
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{
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readonly double _frequency;
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public double Frequency
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{
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get { return _frequency; }
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}
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public FrequencyDetectedEventArgs(double frequency)
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{
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_frequency = frequency;
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}
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}
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}
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@@ -0,0 +1,71 @@
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<?xml version="1.0" encoding="utf-8"?>
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<Project ToolsVersion="3.5" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
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<PropertyGroup>
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<Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
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<Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
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<ProductVersion>9.0.30729</ProductVersion>
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<SchemaVersion>2.0</SchemaVersion>
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<ProjectGuid>{72165201-B9EA-45BD-96F9-9E81094C9BF0}</ProjectGuid>
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<OutputType>Library</OutputType>
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<AppDesignerFolder>Properties</AppDesignerFolder>
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<RootNamespace>FrequencyDetection</RootNamespace>
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<AssemblyName>FrequencyDetection</AssemblyName>
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<TargetFrameworkVersion>v3.5</TargetFrameworkVersion>
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<FileAlignment>512</FileAlignment>
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</PropertyGroup>
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<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
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<DebugSymbols>true</DebugSymbols>
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<DebugType>full</DebugType>
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<Optimize>false</Optimize>
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<OutputPath>bin\Debug\</OutputPath>
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<DefineConstants>DEBUG;TRACE</DefineConstants>
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<ErrorReport>prompt</ErrorReport>
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<WarningLevel>4</WarningLevel>
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</PropertyGroup>
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<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
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<DebugType>pdbonly</DebugType>
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<Optimize>true</Optimize>
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<OutputPath>bin\Release\</OutputPath>
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<DefineConstants>TRACE</DefineConstants>
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<ErrorReport>prompt</ErrorReport>
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<WarningLevel>4</WarningLevel>
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</PropertyGroup>
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<ItemGroup>
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<Reference Include="System" />
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<Reference Include="System.Core">
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<RequiredTargetFramework>3.5</RequiredTargetFramework>
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</Reference>
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<Reference Include="System.Xml.Linq">
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<RequiredTargetFramework>3.5</RequiredTargetFramework>
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</Reference>
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<Reference Include="System.Data.DataSetExtensions">
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<RequiredTargetFramework>3.5</RequiredTargetFramework>
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</Reference>
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<Reference Include="System.Data" />
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<Reference Include="System.Xml" />
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</ItemGroup>
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<ItemGroup>
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<Compile Include="FrequencyDetectedEventArgs.cs" />
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<Compile Include="FrequencyInfoSource.cs" />
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<Compile Include="Properties\AssemblyInfo.cs" />
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<Compile Include="SoundFrequencyInfoSource.cs" />
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</ItemGroup>
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<ItemGroup>
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<ProjectReference Include="..\SoundAnalysis\SoundAnalysis.csproj">
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<Project>{ABA54DC3-324B-49DE-B79E-C4F573306E4F}</Project>
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<Name>SoundAnalysis</Name>
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</ProjectReference>
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<ProjectReference Include="..\SoundCapture\SoundCapture.csproj">
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<Project>{DAE12676-B26C-4487-A1A5-D7FE2E64E6CE}</Project>
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<Name>SoundCapture</Name>
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</ProjectReference>
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</ItemGroup>
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<Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
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<!-- To modify your build process, add your task inside one of the targets below and uncomment it.
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Other similar extension points exist, see Microsoft.Common.targets.
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<Target Name="BeforeBuild">
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</Target>
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<Target Name="AfterBuild">
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</Target>
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-->
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</Project>
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@@ -0,0 +1,20 @@
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using System;
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namespace FrequencyDetection
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{
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public abstract class FrequencyInfoSource
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{
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public abstract void Listen();
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public abstract void Stop();
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public event EventHandler<FrequencyDetectedEventArgs> FrequencyDetected;
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protected void OnFrequencyDetected(FrequencyDetectedEventArgs e)
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{
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if (FrequencyDetected != null)
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{
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FrequencyDetected(this, e);
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}
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}
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}
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}
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@@ -0,0 +1,36 @@
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using System.Reflection;
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using System.Runtime.CompilerServices;
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using System.Runtime.InteropServices;
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// General Information about an assembly is controlled through the following
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// set of attributes. Change these attribute values to modify the information
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// associated with an assembly.
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[assembly: AssemblyTitle("FrequencyDetection")]
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[assembly: AssemblyDescription("")]
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[assembly: AssemblyConfiguration("")]
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[assembly: AssemblyCompany("")]
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[assembly: AssemblyProduct("FrequencyDetection")]
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[assembly: AssemblyCopyright("Copyright © 2009")]
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[assembly: AssemblyTrademark("")]
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[assembly: AssemblyCulture("")]
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// Setting ComVisible to false makes the types in this assembly not visible
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// to COM components. If you need to access a type in this assembly from
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// COM, set the ComVisible attribute to true on that type.
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[assembly: ComVisible(false)]
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// The following GUID is for the ID of the typelib if this project is exposed to COM
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[assembly: Guid("cad84e03-98ea-4500-98e4-eef0b4e47094")]
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// Version information for an assembly consists of the following four values:
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//
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// Major Version
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// Minor Version
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// Build Number
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// Revision
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//
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// You can specify all the values or you can default the Build and Revision Numbers
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// by using the '*' as shown below:
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// [assembly: AssemblyVersion("1.0.*")]
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[assembly: AssemblyVersion("1.0.0.0")]
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[assembly: AssemblyFileVersion("1.0.0.0")]
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@@ -0,0 +1,69 @@
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using System;
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using SoundAnalysis;
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using SoundCapture;
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namespace FrequencyDetection
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{
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public class SoundFrequencyInfoSource : FrequencyInfoSource
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{
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readonly SoundCaptureDevice _device;
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Adapter _adapter;
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public SoundFrequencyInfoSource(SoundCaptureDevice device)
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{
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_device = device;
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}
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public override void Listen()
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{
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_adapter = new Adapter(this, _device);
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_adapter.Start();
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}
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public override void Stop()
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{
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_adapter.Stop();
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}
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class Adapter : SoundCaptureBase
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{
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readonly SoundFrequencyInfoSource _owner;
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const double MinFreq = 60;
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const double MaxFreq = 1300;
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internal Adapter(SoundFrequencyInfoSource owner, SoundCaptureDevice device)
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: base(device)
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{
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_owner = owner;
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}
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protected override void ProcessData(short[] data)
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{
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double[] x = new double[data.Length];
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for (int i = 0; i < x.Length; i++)
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{
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x[i] = data[i];
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}
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double[] spectr = FftAlgorithm.Calculate(x);
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int index = 0;
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double max = spectr[0];
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int usefullMaxSpectr = Math.Min(spectr.Length,
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(int)(MaxFreq * spectr.Length / SampleRate) + 1);
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for (int i = 1; i < usefullMaxSpectr; i++)
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{
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if (max < spectr[i])
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{
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max = spectr[i]; index = i;
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}
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}
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double freq = (double)SampleRate * index / spectr.Length;
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if (freq < MinFreq) freq = 0;
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_owner.OnFrequencyDetected(new FrequencyDetectedEventArgs(freq));
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}
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}
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}
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}
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