AudioGraph.CreateFileInputNodeAsync 导致 FormatNotSupported with wav 和 AudioNodeEmitter

Question

我正在尝试 AudioGraph 1.1 中的新空间音频功能 API 并且我从一个没有发射器的文件中输出声音，但是当我将发射器添加到我的节点创建时突然调用它returns 不支持格式。我无法通过搜索找到任何有用的信息，可能是因为它太新了 API。任何人都可以看到我做错了什么或遗漏了什么吗？以下是我的代码：

private async void MainPage_Loaded(object sender, RoutedEventArgs args)
        {
            AudioGraphSettings settings = new AudioGraphSettings(AudioRenderCategory.Media);
            var devices = await DeviceInformation.FindAllAsync();
            CreateAudioGraphResult result = await AudioGraph.CreateAsync(settings);
            if (result.Status != AudioGraphCreationStatus.Success)
            {
                return;
            }
            graph = result.Graph;

            FileOpenPicker saveFilePicker = new FileOpenPicker();
            saveFilePicker.FileTypeFilter.Add(".wav");
            saveFilePicker.FileTypeFilter.Add(".wma");
            saveFilePicker.FileTypeFilter.Add(".mp3");
            StorageFile file = await saveFilePicker.PickSingleFileAsync();

            if (file == null)
            {
                return;
            }

            AudioNodeEmitter emitter = new AudioNodeEmitter(AudioNodeEmitterShape.CreateOmnidirectional(),
                AudioNodeEmitterDecayModel.CreateNatural(.1,1,10,100),
                AudioNodeEmitterSettings.None);
            emitter.Position = new Vector3(10, 0, 5);

            CreateAudioDeviceOutputNodeResult deviceOutputNodeResult = await graph.CreateDeviceOutputNodeAsync();
            var outputNode = deviceOutputNodeResult.DeviceOutputNode;

            CreateAudioFileInputNodeResult fileInputNodeResult = await graph.CreateFileInputNodeAsync(file, emitter);
            inputNode = fileInputNodeResult.FileInputNode;

            inputNode.AddOutgoingConnection(outputNode);
            graph.Start();
        }

Answer 1

你的代码没有问题，问题是：

Audio node emitters can only process audio that is formatted in mono with a sample rate of 48kHz. Attempting to use stereo audio or audio with a different sample rate will result in an exception.

可以参考Spatial audio的注释部分。

要测试此 API，您可以下载此 audio here。

AudioGraph.CreateFileInputNodeAsync 导致 FormatNotSupported with wav 和 AudioNodeEmitter

AudioGraph.CreateFileInputNodeAsync resulting in FormatNotSupported with wav and AudioNodeEmitter

audio

windows-runtime

uwp