diff --git a/Correlator/DataService/AudioServiceImpl.cs b/Correlator/DataService/AudioServiceImpl.cs
index 8e2a134..fc7a865 100644
--- a/Correlator/DataService/AudioServiceImpl.cs
+++ b/Correlator/DataService/AudioServiceImpl.cs
@@ -1,6 +1,5 @@
 using System;
 using System.Threading;
-using System.Threading.Tasks;
 using Correlator.SensorHubTag;
 using Correlator.Util;
 using NAudio.Wave;
@@ -9,24 +8,18 @@
 {
     public class AudioServiceImpl : IAudioService
     {
+        private bool _isStopped;
         private WaveFileWriter _waveFileWriter;
-
-        private readonly WaveOut _waveOut = new WaveOut();
-
-        private readonly Lazy<BufferedWaveProvider> _lazyWaveProvider = new Lazy<BufferedWaveProvider>(
-            () => new BufferedWaveProvider(new WaveFormat(7500, 24, 1))
-        );
+        private BufferedWaveProvider _waveProvider;
+        private readonly WaveFormat _waveFormat = new WaveFormat(7500, 24, 1);
 
         public void Start(string deviceCode)
         {
-            //异步执行听音，不然会卡住界面
-            Task.Run(delegate { StartListenAudio(deviceCode); });
-        }
+            _isStopped = false;
 
-        private void StartListenAudio(string deviceCode)
-        {
-            _waveOut.Init(_lazyWaveProvider.Value);
-            _waveOut.Play();
+            _waveProvider = new BufferedWaveProvider(_waveFormat);
+            var waveOut = new WaveOut();
+            waveOut.Init(_waveProvider);
 
             string fileName;
             var audioDir = DirectoryManager.GetAudioDir();
@@ -42,30 +35,30 @@
                 fileName = $"{audioDir}/听音_蓝_{time}.wav";
             }
 
-            _waveFileWriter = new WaveFileWriter(fileName, new WaveFormat(7500, 24, 1));
+            _waveFileWriter = new WaveFileWriter(fileName, _waveFormat);
+
+            //异步执行听音，不然会卡住界面
+            waveOut.Play();
         }
 
+        //缓存声波数据已经是后台线程了（处于线程池中）
         public void Write(byte[] pcm)
         {
-            _lazyWaveProvider.Value.AddSamples(pcm, 0, pcm.Length);
-
-            //将pcm数据保存为wav格式文件
-            if (_waveFileWriter == null)
+            if (_isStopped)
             {
                 return;
             }
 
-            _waveFileWriter.Write(pcm, 0, pcm.Length);
+            _waveProvider?.AddSamples(pcm, 0, pcm.Length);
+            _waveFileWriter?.Write(pcm, 0, pcm.Length);
         }
 
         public void Stop()
         {
-            _waveOut.Stop();
+            _isStopped = true;
 
+            _waveProvider.ClearBuffer();
             _waveFileWriter.Dispose();
-            _waveFileWriter = null;
-
-            _lazyWaveProvider.Value.ClearBuffer();
         }
     }
 }
\ No newline at end of file

diff --git a/Correlator/DataService/AudioServiceImpl.cs b/Correlator/DataService/AudioServiceImpl.cs
index 8e2a134..fc7a865 100644
--- a/Correlator/DataService/AudioServiceImpl.cs
+++ b/Correlator/DataService/AudioServiceImpl.cs
@@ -1,6 +1,5 @@
 using System;
 using System.Threading;
-using System.Threading.Tasks;
 using Correlator.SensorHubTag;
 using Correlator.Util;
 using NAudio.Wave;
@@ -9,24 +8,18 @@
 {
     public class AudioServiceImpl : IAudioService
     {
+        private bool _isStopped;
         private WaveFileWriter _waveFileWriter;
-
-        private readonly WaveOut _waveOut = new WaveOut();
-
-        private readonly Lazy<BufferedWaveProvider> _lazyWaveProvider = new Lazy<BufferedWaveProvider>(
-            () => new BufferedWaveProvider(new WaveFormat(7500, 24, 1))
-        );
+        private BufferedWaveProvider _waveProvider;
+        private readonly WaveFormat _waveFormat = new WaveFormat(7500, 24, 1);
 
         public void Start(string deviceCode)
         {
-            //异步执行听音，不然会卡住界面
-            Task.Run(delegate { StartListenAudio(deviceCode); });
-        }
+            _isStopped = false;
 
-        private void StartListenAudio(string deviceCode)
-        {
-            _waveOut.Init(_lazyWaveProvider.Value);
-            _waveOut.Play();
+            _waveProvider = new BufferedWaveProvider(_waveFormat);
+            var waveOut = new WaveOut();
+            waveOut.Init(_waveProvider);
 
             string fileName;
             var audioDir = DirectoryManager.GetAudioDir();
@@ -42,30 +35,30 @@
                 fileName = $"{audioDir}/听音_蓝_{time}.wav";
             }
 
-            _waveFileWriter = new WaveFileWriter(fileName, new WaveFormat(7500, 24, 1));
+            _waveFileWriter = new WaveFileWriter(fileName, _waveFormat);
+
+            //异步执行听音，不然会卡住界面
+            waveOut.Play();
         }
 
+        //缓存声波数据已经是后台线程了（处于线程池中）
         public void Write(byte[] pcm)
         {
-            _lazyWaveProvider.Value.AddSamples(pcm, 0, pcm.Length);
-
-            //将pcm数据保存为wav格式文件
-            if (_waveFileWriter == null)
+            if (_isStopped)
             {
                 return;
             }
 
-            _waveFileWriter.Write(pcm, 0, pcm.Length);
+            _waveProvider?.AddSamples(pcm, 0, pcm.Length);
+            _waveFileWriter?.Write(pcm, 0, pcm.Length);
         }
 
         public void Stop()
         {
-            _waveOut.Stop();
+            _isStopped = true;
 
+            _waveProvider.ClearBuffer();
             _waveFileWriter.Dispose();
-            _waveFileWriter = null;
-
-            _lazyWaveProvider.Value.ClearBuffer();
         }
     }
 }
\ No newline at end of file
diff --git a/Correlator/Util/AudioVisualizer.cs b/Correlator/Util/AudioVisualizer.cs
index c4b1f45..9a888f5 100644
--- a/Correlator/Util/AudioVisualizer.cs
+++ b/Correlator/Util/AudioVisualizer.cs
@@ -2,6 +2,7 @@
 using System.Linq;
 using FftSharp;
 using FftSharp.Windows;
+using Complex = System.Numerics.Complex;
 
 namespace Correlator.Util
 {
@@ -69,7 +70,7 @@
                 data[i] = new Complex(SampleData[i], 0);
             }
 
-            Transform.FFT(data);
+            FFT.Forward(data);
 
             var halfLen = len / 2;
             var result = new double[halfLen]; // 傅里叶变换结果左右对称, 只需要取一半

diff --git a/Correlator/DataService/AudioServiceImpl.cs b/Correlator/DataService/AudioServiceImpl.cs
index 8e2a134..fc7a865 100644
--- a/Correlator/DataService/AudioServiceImpl.cs
+++ b/Correlator/DataService/AudioServiceImpl.cs
@@ -1,6 +1,5 @@
 using System;
 using System.Threading;
-using System.Threading.Tasks;
 using Correlator.SensorHubTag;
 using Correlator.Util;
 using NAudio.Wave;
@@ -9,24 +8,18 @@
 {
     public class AudioServiceImpl : IAudioService
     {
+        private bool _isStopped;
         private WaveFileWriter _waveFileWriter;
-
-        private readonly WaveOut _waveOut = new WaveOut();
-
-        private readonly Lazy<BufferedWaveProvider> _lazyWaveProvider = new Lazy<BufferedWaveProvider>(
-            () => new BufferedWaveProvider(new WaveFormat(7500, 24, 1))
-        );
+        private BufferedWaveProvider _waveProvider;
+        private readonly WaveFormat _waveFormat = new WaveFormat(7500, 24, 1);
 
         public void Start(string deviceCode)
         {
-            //异步执行听音，不然会卡住界面
-            Task.Run(delegate { StartListenAudio(deviceCode); });
-        }
+            _isStopped = false;
 
-        private void StartListenAudio(string deviceCode)
-        {
-            _waveOut.Init(_lazyWaveProvider.Value);
-            _waveOut.Play();
+            _waveProvider = new BufferedWaveProvider(_waveFormat);
+            var waveOut = new WaveOut();
+            waveOut.Init(_waveProvider);
 
             string fileName;
             var audioDir = DirectoryManager.GetAudioDir();
@@ -42,30 +35,30 @@
                 fileName = $"{audioDir}/听音_蓝_{time}.wav";
             }
 
-            _waveFileWriter = new WaveFileWriter(fileName, new WaveFormat(7500, 24, 1));
+            _waveFileWriter = new WaveFileWriter(fileName, _waveFormat);
+
+            //异步执行听音，不然会卡住界面
+            waveOut.Play();
         }
 
+        //缓存声波数据已经是后台线程了（处于线程池中）
         public void Write(byte[] pcm)
         {
-            _lazyWaveProvider.Value.AddSamples(pcm, 0, pcm.Length);
-
-            //将pcm数据保存为wav格式文件
-            if (_waveFileWriter == null)
+            if (_isStopped)
             {
                 return;
             }
 
-            _waveFileWriter.Write(pcm, 0, pcm.Length);
+            _waveProvider?.AddSamples(pcm, 0, pcm.Length);
+            _waveFileWriter?.Write(pcm, 0, pcm.Length);
         }
 
         public void Stop()
         {
-            _waveOut.Stop();
+            _isStopped = true;
 
+            _waveProvider.ClearBuffer();
             _waveFileWriter.Dispose();
-            _waveFileWriter = null;
-
-            _lazyWaveProvider.Value.ClearBuffer();
         }
     }
 }
\ No newline at end of file
diff --git a/Correlator/Util/AudioVisualizer.cs b/Correlator/Util/AudioVisualizer.cs
index c4b1f45..9a888f5 100644
--- a/Correlator/Util/AudioVisualizer.cs
+++ b/Correlator/Util/AudioVisualizer.cs
@@ -2,6 +2,7 @@
 using System.Linq;
 using FftSharp;
 using FftSharp.Windows;
+using Complex = System.Numerics.Complex;
 
 namespace Correlator.Util
 {
@@ -69,7 +70,7 @@
                 data[i] = new Complex(SampleData[i], 0);
             }
 
-            Transform.FFT(data);
+            FFT.Forward(data);
 
             var halfLen = len / 2;
             var result = new double[halfLen]; // 傅里叶变换结果左右对称, 只需要取一半
diff --git a/Correlator/ViewModels/AudioFileViewModel.cs b/Correlator/ViewModels/AudioFileViewModel.cs
index 8366c70..f614c12 100644
--- a/Correlator/ViewModels/AudioFileViewModel.cs
+++ b/Correlator/ViewModels/AudioFileViewModel.cs
@@ -10,7 +10,6 @@
 using HandyControl.Data;
 using NAudio.Wave;
 using Prism.Commands;
-using Prism.Events;
 using Prism.Mvvm;
 using Prism.Services.Dialogs;
 
@@ -117,7 +116,7 @@
             Interval = new TimeSpan(0, 0, 0, 1)
         };
 
-        public AudioFileViewModel(IDialogService dialogService, IEventAggregator eventAggregator)
+        public AudioFileViewModel(IDialogService dialogService)
         {
             _audioTimer.Tick += delegate
             {
@@ -236,6 +235,8 @@
                     //刷新数据
                     _totalFiles = GetTotalAudioFiles();
                     MaxPage = _totalFiles.Count.GetPageSize();
+                    //页码重置
+                    PageIndex = 1;
                     AudioFiles = _totalFiles.Take(RuntimeCache.PerPageItemCount).ToList();
                 }
                 catch (IOException)
@@ -281,11 +282,11 @@
         {
             var audioFiles = new List<AudioFile>();
             var i = 1;
-            //筛选大于1K的音频文件
+            //筛选大于50K的音频文件
             var files = new DirectoryInfo(DirectoryManager.GetAudioDir()).GetFiles("*", SearchOption.AllDirectories);
             foreach (var file in files)
             {
-                if (file.Length < 1024)
+                if (file.Length < 1024 * 50)
                 {
                     RuntimeCache.SmallAudioFiles.Add(file.FullName);
                 }

diff --git a/Correlator/DataService/AudioServiceImpl.cs b/Correlator/DataService/AudioServiceImpl.cs
index 8e2a134..fc7a865 100644
--- a/Correlator/DataService/AudioServiceImpl.cs
+++ b/Correlator/DataService/AudioServiceImpl.cs
@@ -1,6 +1,5 @@
 using System;
 using System.Threading;
-using System.Threading.Tasks;
 using Correlator.SensorHubTag;
 using Correlator.Util;
 using NAudio.Wave;
@@ -9,24 +8,18 @@
 {
     public class AudioServiceImpl : IAudioService
     {
+        private bool _isStopped;
         private WaveFileWriter _waveFileWriter;
-
-        private readonly WaveOut _waveOut = new WaveOut();
-
-        private readonly Lazy<BufferedWaveProvider> _lazyWaveProvider = new Lazy<BufferedWaveProvider>(
-            () => new BufferedWaveProvider(new WaveFormat(7500, 24, 1))
-        );
+        private BufferedWaveProvider _waveProvider;
+        private readonly WaveFormat _waveFormat = new WaveFormat(7500, 24, 1);
 
         public void Start(string deviceCode)
         {
-            //异步执行听音，不然会卡住界面
-            Task.Run(delegate { StartListenAudio(deviceCode); });
-        }
+            _isStopped = false;
 
-        private void StartListenAudio(string deviceCode)
-        {
-            _waveOut.Init(_lazyWaveProvider.Value);
-            _waveOut.Play();
+            _waveProvider = new BufferedWaveProvider(_waveFormat);
+            var waveOut = new WaveOut();
+            waveOut.Init(_waveProvider);
 
             string fileName;
             var audioDir = DirectoryManager.GetAudioDir();
@@ -42,30 +35,30 @@
                 fileName = $"{audioDir}/听音_蓝_{time}.wav";
             }
 
-            _waveFileWriter = new WaveFileWriter(fileName, new WaveFormat(7500, 24, 1));
+            _waveFileWriter = new WaveFileWriter(fileName, _waveFormat);
+
+            //异步执行听音，不然会卡住界面
+            waveOut.Play();
         }
 
+        //缓存声波数据已经是后台线程了（处于线程池中）
         public void Write(byte[] pcm)
         {
-            _lazyWaveProvider.Value.AddSamples(pcm, 0, pcm.Length);
-
-            //将pcm数据保存为wav格式文件
-            if (_waveFileWriter == null)
+            if (_isStopped)
             {
                 return;
             }
 
-            _waveFileWriter.Write(pcm, 0, pcm.Length);
+            _waveProvider?.AddSamples(pcm, 0, pcm.Length);
+            _waveFileWriter?.Write(pcm, 0, pcm.Length);
         }
 
         public void Stop()
         {
-            _waveOut.Stop();
+            _isStopped = true;
 
+            _waveProvider.ClearBuffer();
             _waveFileWriter.Dispose();
-            _waveFileWriter = null;
-
-            _lazyWaveProvider.Value.ClearBuffer();
         }
     }
 }
\ No newline at end of file
diff --git a/Correlator/Util/AudioVisualizer.cs b/Correlator/Util/AudioVisualizer.cs
index c4b1f45..9a888f5 100644
--- a/Correlator/Util/AudioVisualizer.cs
+++ b/Correlator/Util/AudioVisualizer.cs
@@ -2,6 +2,7 @@
 using System.Linq;
 using FftSharp;
 using FftSharp.Windows;
+using Complex = System.Numerics.Complex;
 
 namespace Correlator.Util
 {
@@ -69,7 +70,7 @@
                 data[i] = new Complex(SampleData[i], 0);
             }
 
-            Transform.FFT(data);
+            FFT.Forward(data);
 
             var halfLen = len / 2;
             var result = new double[halfLen]; // 傅里叶变换结果左右对称, 只需要取一半
diff --git a/Correlator/ViewModels/AudioFileViewModel.cs b/Correlator/ViewModels/AudioFileViewModel.cs
index 8366c70..f614c12 100644
--- a/Correlator/ViewModels/AudioFileViewModel.cs
+++ b/Correlator/ViewModels/AudioFileViewModel.cs
@@ -10,7 +10,6 @@
 using HandyControl.Data;
 using NAudio.Wave;
 using Prism.Commands;
-using Prism.Events;
 using Prism.Mvvm;
 using Prism.Services.Dialogs;
 
@@ -117,7 +116,7 @@
             Interval = new TimeSpan(0, 0, 0, 1)
         };
 
-        public AudioFileViewModel(IDialogService dialogService, IEventAggregator eventAggregator)
+        public AudioFileViewModel(IDialogService dialogService)
         {
             _audioTimer.Tick += delegate
             {
@@ -236,6 +235,8 @@
                     //刷新数据
                     _totalFiles = GetTotalAudioFiles();
                     MaxPage = _totalFiles.Count.GetPageSize();
+                    //页码重置
+                    PageIndex = 1;
                     AudioFiles = _totalFiles.Take(RuntimeCache.PerPageItemCount).ToList();
                 }
                 catch (IOException)
@@ -281,11 +282,11 @@
         {
             var audioFiles = new List<AudioFile>();
             var i = 1;
-            //筛选大于1K的音频文件
+            //筛选大于50K的音频文件
             var files = new DirectoryInfo(DirectoryManager.GetAudioDir()).GetFiles("*", SearchOption.AllDirectories);
             foreach (var file in files)
             {
-                if (file.Length < 1024)
+                if (file.Length < 1024 * 50)
                 {
                     RuntimeCache.SmallAudioFiles.Add(file.FullName);
                 }
diff --git a/Correlator/ViewModels/PictureFileViewModel.cs b/Correlator/ViewModels/PictureFileViewModel.cs
index de4d7bb..74f86fd 100644
--- a/Correlator/ViewModels/PictureFileViewModel.cs
+++ b/Correlator/ViewModels/PictureFileViewModel.cs
@@ -116,6 +116,8 @@
                     //刷新数据
                     _totalFiles = GetTotalPictureFiles();
                     MaxPage = _totalFiles.Count.GetPageSize();
+                    //页码重置
+                    PageIndex = 1;
                     PictureFiles = _totalFiles.Take(RuntimeCache.PerPageItemCount).ToList();
                 }
                 catch (IOException)

diff --git a/Correlator/DataService/AudioServiceImpl.cs b/Correlator/DataService/AudioServiceImpl.cs
index 8e2a134..fc7a865 100644
--- a/Correlator/DataService/AudioServiceImpl.cs
+++ b/Correlator/DataService/AudioServiceImpl.cs
@@ -1,6 +1,5 @@
 using System;
 using System.Threading;
-using System.Threading.Tasks;
 using Correlator.SensorHubTag;
 using Correlator.Util;
 using NAudio.Wave;
@@ -9,24 +8,18 @@
 {
     public class AudioServiceImpl : IAudioService
     {
+        private bool _isStopped;
         private WaveFileWriter _waveFileWriter;
-
-        private readonly WaveOut _waveOut = new WaveOut();
-
-        private readonly Lazy<BufferedWaveProvider> _lazyWaveProvider = new Lazy<BufferedWaveProvider>(
-            () => new BufferedWaveProvider(new WaveFormat(7500, 24, 1))
-        );
+        private BufferedWaveProvider _waveProvider;
+        private readonly WaveFormat _waveFormat = new WaveFormat(7500, 24, 1);
 
         public void Start(string deviceCode)
         {
-            //异步执行听音，不然会卡住界面
-            Task.Run(delegate { StartListenAudio(deviceCode); });
-        }
+            _isStopped = false;
 
-        private void StartListenAudio(string deviceCode)
-        {
-            _waveOut.Init(_lazyWaveProvider.Value);
-            _waveOut.Play();
+            _waveProvider = new BufferedWaveProvider(_waveFormat);
+            var waveOut = new WaveOut();
+            waveOut.Init(_waveProvider);
 
             string fileName;
             var audioDir = DirectoryManager.GetAudioDir();
@@ -42,30 +35,30 @@
                 fileName = $"{audioDir}/听音_蓝_{time}.wav";
             }
 
-            _waveFileWriter = new WaveFileWriter(fileName, new WaveFormat(7500, 24, 1));
+            _waveFileWriter = new WaveFileWriter(fileName, _waveFormat);
+
+            //异步执行听音，不然会卡住界面
+            waveOut.Play();
         }
 
+        //缓存声波数据已经是后台线程了（处于线程池中）
         public void Write(byte[] pcm)
         {
-            _lazyWaveProvider.Value.AddSamples(pcm, 0, pcm.Length);
-
-            //将pcm数据保存为wav格式文件
-            if (_waveFileWriter == null)
+            if (_isStopped)
             {
                 return;
             }
 
-            _waveFileWriter.Write(pcm, 0, pcm.Length);
+            _waveProvider?.AddSamples(pcm, 0, pcm.Length);
+            _waveFileWriter?.Write(pcm, 0, pcm.Length);
         }
 
         public void Stop()
         {
-            _waveOut.Stop();
+            _isStopped = true;
 
+            _waveProvider.ClearBuffer();
             _waveFileWriter.Dispose();
-            _waveFileWriter = null;
-
-            _lazyWaveProvider.Value.ClearBuffer();
         }
     }
 }
\ No newline at end of file
diff --git a/Correlator/Util/AudioVisualizer.cs b/Correlator/Util/AudioVisualizer.cs
index c4b1f45..9a888f5 100644
--- a/Correlator/Util/AudioVisualizer.cs
+++ b/Correlator/Util/AudioVisualizer.cs
@@ -2,6 +2,7 @@
 using System.Linq;
 using FftSharp;
 using FftSharp.Windows;
+using Complex = System.Numerics.Complex;
 
 namespace Correlator.Util
 {
@@ -69,7 +70,7 @@
                 data[i] = new Complex(SampleData[i], 0);
             }
 
-            Transform.FFT(data);
+            FFT.Forward(data);
 
             var halfLen = len / 2;
             var result = new double[halfLen]; // 傅里叶变换结果左右对称, 只需要取一半
diff --git a/Correlator/ViewModels/AudioFileViewModel.cs b/Correlator/ViewModels/AudioFileViewModel.cs
index 8366c70..f614c12 100644
--- a/Correlator/ViewModels/AudioFileViewModel.cs
+++ b/Correlator/ViewModels/AudioFileViewModel.cs
@@ -10,7 +10,6 @@
 using HandyControl.Data;
 using NAudio.Wave;
 using Prism.Commands;
-using Prism.Events;
 using Prism.Mvvm;
 using Prism.Services.Dialogs;
 
@@ -117,7 +116,7 @@
             Interval = new TimeSpan(0, 0, 0, 1)
         };
 
-        public AudioFileViewModel(IDialogService dialogService, IEventAggregator eventAggregator)
+        public AudioFileViewModel(IDialogService dialogService)
         {
             _audioTimer.Tick += delegate
             {
@@ -236,6 +235,8 @@
                     //刷新数据
                     _totalFiles = GetTotalAudioFiles();
                     MaxPage = _totalFiles.Count.GetPageSize();
+                    //页码重置
+                    PageIndex = 1;
                     AudioFiles = _totalFiles.Take(RuntimeCache.PerPageItemCount).ToList();
                 }
                 catch (IOException)
@@ -281,11 +282,11 @@
         {
             var audioFiles = new List<AudioFile>();
             var i = 1;
-            //筛选大于1K的音频文件
+            //筛选大于50K的音频文件
             var files = new DirectoryInfo(DirectoryManager.GetAudioDir()).GetFiles("*", SearchOption.AllDirectories);
             foreach (var file in files)
             {
-                if (file.Length < 1024)
+                if (file.Length < 1024 * 50)
                 {
                     RuntimeCache.SmallAudioFiles.Add(file.FullName);
                 }
diff --git a/Correlator/ViewModels/PictureFileViewModel.cs b/Correlator/ViewModels/PictureFileViewModel.cs
index de4d7bb..74f86fd 100644
--- a/Correlator/ViewModels/PictureFileViewModel.cs
+++ b/Correlator/ViewModels/PictureFileViewModel.cs
@@ -116,6 +116,8 @@
                     //刷新数据
                     _totalFiles = GetTotalPictureFiles();
                     MaxPage = _totalFiles.Count.GetPageSize();
+                    //页码重置
+                    PageIndex = 1;
                     PictureFiles = _totalFiles.Take(RuntimeCache.PerPageItemCount).ToList();
                 }
                 catch (IOException)
diff --git a/Correlator/Views/AudioFileView.xaml.cs b/Correlator/Views/AudioFileView.xaml.cs
index 3c133d8..69b5eff 100644
--- a/Correlator/Views/AudioFileView.xaml.cs
+++ b/Correlator/Views/AudioFileView.xaml.cs
@@ -8,7 +8,6 @@
 using Correlator.Util;
 using NAudio.CoreAudioApi;
 using NAudio.Wave;
-using Prism.Events;
 
 namespace Correlator.Views
 {
@@ -30,12 +29,12 @@
             Interval = new TimeSpan(0, 0, 0, 0, 30)
         };
 
-        public AudioFileView(IApplicationDataService dataService, IEventAggregator eventAggregator)
+        public AudioFileView(IApplicationDataService dataService)
         {
             InitializeComponent();
 
             _capture = new WasapiLoopbackCapture(); // 捕获电脑发出的声音
-            _visualizer = new AudioVisualizer(256);
+            _visualizer = new AudioVisualizer(512);
 
             _allColors = dataService.GetAllHsvColors(); // 获取所有的渐变颜色 (HSV 颜色)
 
@@ -43,7 +42,7 @@
             _capture.DataAvailable += delegate(object o, WaveInEventArgs args)
             {
                 var length = args.BytesRecorded / 4; // 采样的数量 (每一个采样是 4 字节)
-                var result = new double[length]; // 声明结果
+                var result = new double[length];
 
                 for (var i = 0; i < length; i++)
                 {
@@ -113,7 +112,7 @@
                 StripsPath, color1, color2,
                 _spectrumData, _spectrumData.Length,
                 StripsPath.ActualWidth, 0, StripsPath.ActualHeight,
-                2, -StripsPath.ActualHeight * 50
+                2, -StripsPath.ActualHeight * 200
             );
         }
 
@@ -130,8 +129,10 @@
         /// <param name="yOffset">绘图的起始 Y 坐标</param>
         /// <param name="spacing">条形与条形之间的间隔(像素)</param>
         /// <param name="scale">控制波形图波峰高度</param>
-        private void DrawGradientStrips(Path stripsPath, Color bottomColor, Color topColor, double[] spectrumData,
-            int stripCount, double drawingWidth, double xOffset, double yOffset, double spacing, double scale)
+        private void DrawGradientStrips(
+            Path stripsPath, Color bottomColor, Color topColor, double[] spectrumData,
+            int stripCount, double drawingWidth, double xOffset, double yOffset, double spacing, double scale
+        )
         {
             //竖条宽度
             var stripWidth = (drawingWidth - spacing * stripCount) / stripCount;

diff --git a/Correlator/DataService/AudioServiceImpl.cs b/Correlator/DataService/AudioServiceImpl.cs
index 8e2a134..fc7a865 100644
--- a/Correlator/DataService/AudioServiceImpl.cs
+++ b/Correlator/DataService/AudioServiceImpl.cs
@@ -1,6 +1,5 @@
 using System;
 using System.Threading;
-using System.Threading.Tasks;
 using Correlator.SensorHubTag;
 using Correlator.Util;
 using NAudio.Wave;
@@ -9,24 +8,18 @@
 {
     public class AudioServiceImpl : IAudioService
     {
+        private bool _isStopped;
         private WaveFileWriter _waveFileWriter;
-
-        private readonly WaveOut _waveOut = new WaveOut();
-
-        private readonly Lazy<BufferedWaveProvider> _lazyWaveProvider = new Lazy<BufferedWaveProvider>(
-            () => new BufferedWaveProvider(new WaveFormat(7500, 24, 1))
-        );
+        private BufferedWaveProvider _waveProvider;
+        private readonly WaveFormat _waveFormat = new WaveFormat(7500, 24, 1);
 
         public void Start(string deviceCode)
         {
-            //异步执行听音，不然会卡住界面
-            Task.Run(delegate { StartListenAudio(deviceCode); });
-        }
+            _isStopped = false;
 
-        private void StartListenAudio(string deviceCode)
-        {
-            _waveOut.Init(_lazyWaveProvider.Value);
-            _waveOut.Play();
+            _waveProvider = new BufferedWaveProvider(_waveFormat);
+            var waveOut = new WaveOut();
+            waveOut.Init(_waveProvider);
 
             string fileName;
             var audioDir = DirectoryManager.GetAudioDir();
@@ -42,30 +35,30 @@
                 fileName = $"{audioDir}/听音_蓝_{time}.wav";
             }
 
-            _waveFileWriter = new WaveFileWriter(fileName, new WaveFormat(7500, 24, 1));
+            _waveFileWriter = new WaveFileWriter(fileName, _waveFormat);
+
+            //异步执行听音，不然会卡住界面
+            waveOut.Play();
         }
 
+        //缓存声波数据已经是后台线程了（处于线程池中）
         public void Write(byte[] pcm)
         {
-            _lazyWaveProvider.Value.AddSamples(pcm, 0, pcm.Length);
-
-            //将pcm数据保存为wav格式文件
-            if (_waveFileWriter == null)
+            if (_isStopped)
             {
                 return;
             }
 
-            _waveFileWriter.Write(pcm, 0, pcm.Length);
+            _waveProvider?.AddSamples(pcm, 0, pcm.Length);
+            _waveFileWriter?.Write(pcm, 0, pcm.Length);
         }
 
         public void Stop()
         {
-            _waveOut.Stop();
+            _isStopped = true;
 
+            _waveProvider.ClearBuffer();
             _waveFileWriter.Dispose();
-            _waveFileWriter = null;
-
-            _lazyWaveProvider.Value.ClearBuffer();
         }
     }
 }
\ No newline at end of file
diff --git a/Correlator/Util/AudioVisualizer.cs b/Correlator/Util/AudioVisualizer.cs
index c4b1f45..9a888f5 100644
--- a/Correlator/Util/AudioVisualizer.cs
+++ b/Correlator/Util/AudioVisualizer.cs
@@ -2,6 +2,7 @@
 using System.Linq;
 using FftSharp;
 using FftSharp.Windows;
+using Complex = System.Numerics.Complex;
 
 namespace Correlator.Util
 {
@@ -69,7 +70,7 @@
                 data[i] = new Complex(SampleData[i], 0);
             }
 
-            Transform.FFT(data);
+            FFT.Forward(data);
 
             var halfLen = len / 2;
             var result = new double[halfLen]; // 傅里叶变换结果左右对称, 只需要取一半
diff --git a/Correlator/ViewModels/AudioFileViewModel.cs b/Correlator/ViewModels/AudioFileViewModel.cs
index 8366c70..f614c12 100644
--- a/Correlator/ViewModels/AudioFileViewModel.cs
+++ b/Correlator/ViewModels/AudioFileViewModel.cs
@@ -10,7 +10,6 @@
 using HandyControl.Data;
 using NAudio.Wave;
 using Prism.Commands;
-using Prism.Events;
 using Prism.Mvvm;
 using Prism.Services.Dialogs;
 
@@ -117,7 +116,7 @@
             Interval = new TimeSpan(0, 0, 0, 1)
         };
 
-        public AudioFileViewModel(IDialogService dialogService, IEventAggregator eventAggregator)
+        public AudioFileViewModel(IDialogService dialogService)
         {
             _audioTimer.Tick += delegate
             {
@@ -236,6 +235,8 @@
                     //刷新数据
                     _totalFiles = GetTotalAudioFiles();
                     MaxPage = _totalFiles.Count.GetPageSize();
+                    //页码重置
+                    PageIndex = 1;
                     AudioFiles = _totalFiles.Take(RuntimeCache.PerPageItemCount).ToList();
                 }
                 catch (IOException)
@@ -281,11 +282,11 @@
         {
             var audioFiles = new List<AudioFile>();
             var i = 1;
-            //筛选大于1K的音频文件
+            //筛选大于50K的音频文件
             var files = new DirectoryInfo(DirectoryManager.GetAudioDir()).GetFiles("*", SearchOption.AllDirectories);
             foreach (var file in files)
             {
-                if (file.Length < 1024)
+                if (file.Length < 1024 * 50)
                 {
                     RuntimeCache.SmallAudioFiles.Add(file.FullName);
                 }
diff --git a/Correlator/ViewModels/PictureFileViewModel.cs b/Correlator/ViewModels/PictureFileViewModel.cs
index de4d7bb..74f86fd 100644
--- a/Correlator/ViewModels/PictureFileViewModel.cs
+++ b/Correlator/ViewModels/PictureFileViewModel.cs
@@ -116,6 +116,8 @@
                     //刷新数据
                     _totalFiles = GetTotalPictureFiles();
                     MaxPage = _totalFiles.Count.GetPageSize();
+                    //页码重置
+                    PageIndex = 1;
                     PictureFiles = _totalFiles.Take(RuntimeCache.PerPageItemCount).ToList();
                 }
                 catch (IOException)
diff --git a/Correlator/Views/AudioFileView.xaml.cs b/Correlator/Views/AudioFileView.xaml.cs
index 3c133d8..69b5eff 100644
--- a/Correlator/Views/AudioFileView.xaml.cs
+++ b/Correlator/Views/AudioFileView.xaml.cs
@@ -8,7 +8,6 @@
 using Correlator.Util;
 using NAudio.CoreAudioApi;
 using NAudio.Wave;
-using Prism.Events;
 
 namespace Correlator.Views
 {
@@ -30,12 +29,12 @@
             Interval = new TimeSpan(0, 0, 0, 0, 30)
         };
 
-        public AudioFileView(IApplicationDataService dataService, IEventAggregator eventAggregator)
+        public AudioFileView(IApplicationDataService dataService)
         {
             InitializeComponent();
 
             _capture = new WasapiLoopbackCapture(); // 捕获电脑发出的声音
-            _visualizer = new AudioVisualizer(256);
+            _visualizer = new AudioVisualizer(512);
 
             _allColors = dataService.GetAllHsvColors(); // 获取所有的渐变颜色 (HSV 颜色)
 
@@ -43,7 +42,7 @@
             _capture.DataAvailable += delegate(object o, WaveInEventArgs args)
             {
                 var length = args.BytesRecorded / 4; // 采样的数量 (每一个采样是 4 字节)
-                var result = new double[length]; // 声明结果
+                var result = new double[length];
 
                 for (var i = 0; i < length; i++)
                 {
@@ -113,7 +112,7 @@
                 StripsPath, color1, color2,
                 _spectrumData, _spectrumData.Length,
                 StripsPath.ActualWidth, 0, StripsPath.ActualHeight,
-                2, -StripsPath.ActualHeight * 50
+                2, -StripsPath.ActualHeight * 200
             );
         }
 
@@ -130,8 +129,10 @@
         /// <param name="yOffset">绘图的起始 Y 坐标</param>
         /// <param name="spacing">条形与条形之间的间隔(像素)</param>
         /// <param name="scale">控制波形图波峰高度</param>
-        private void DrawGradientStrips(Path stripsPath, Color bottomColor, Color topColor, double[] spectrumData,
-            int stripCount, double drawingWidth, double xOffset, double yOffset, double spacing, double scale)
+        private void DrawGradientStrips(
+            Path stripsPath, Color bottomColor, Color topColor, double[] spectrumData,
+            int stripCount, double drawingWidth, double xOffset, double yOffset, double spacing, double scale
+        )
         {
             //竖条宽度
             var stripWidth = (drawingWidth - spacing * stripCount) / stripCount;
diff --git a/Correlator/Views/PictureFileView.xaml b/Correlator/Views/PictureFileView.xaml
index b521016..2112f87 100644
--- a/Correlator/Views/PictureFileView.xaml
+++ b/Correlator/Views/PictureFileView.xaml
@@ -135,7 +135,6 @@
             Margin="30,0"
             HorizontalAlignment="Center"
             VerticalAlignment="Center"
-            DataCountPerPage="5"
             IsJumpEnabled="True"
             MaxPageCount="{Binding MaxPage}"
             PageIndex="{Binding PageIndex}">