如何在UWP应用上播放原始的pcm音频字节？

using System;
using Windows.Foundation;
using Windows.Media.Audio;
using Windows.Media.Render;

public class AudioPlayer
{
    private AudioGraph audioGraph;
    private AudioFrameOutputNode outputNode;

    public async void PlayPCM(byte[] pcmData, int sampleRate, int channels)
    {
        // 创建AudioGraph对象
        AudioGraphSettings settings = new AudioGraphSettings(AudioRenderCategory.Media);
        CreateAudioGraphResult result = await AudioGraph.CreateAsync(settings);
        if (result.Status != AudioGraphCreationStatus.Success)
        {
            // 创建失败，处理错误
            return;
        }
        audioGraph = result.Graph;

        // 创建AudioFrameOutputNode对象
        AudioEncodingProperties encodingProperties = AudioEncodingProperties.CreatePcm(sampleRate, (uint)channels, 16);
        outputNode = audioGraph.CreateFrameOutputNode(encodingProperties);

        // 连接AudioFrameOutputNode到音频输出设备
        outputNode.AddOutgoingConnection(await audioGraph.CreateDeviceOutputNodeAsync());

        // 创建缓冲区
        AudioFrame frame = new AudioFrame((uint)pcmData.Length);
        using (AudioBuffer buffer = frame.LockBuffer(AudioBufferAccessMode.Write))
        using (IMemoryBufferReference reference = buffer.CreateReference())
        {
            // 获取缓冲区的数据
            byte* dataInBytes;
            uint capacityInBytes;
            ((IMemoryBufferByteAccess)reference).GetBuffer(out dataInBytes, out capacityInBytes);

            // 将PCM音频字节写入缓冲区
            for (int i = 0; i < pcmData.Length; i++)
            {
                dataInBytes[i] = pcmData[i];
            }
        }

        // 将缓冲区中的音频数据写入AudioFrameOutputNode
        outputNode.AddFrame(frame);
        
        // 开始播放音频
        audioGraph.Start();
    }
}