# MLAudioType

The audio type describes audio buffers.

## Creating the Type

The audio type can be created with audio information, or by inspecting an audio or video file:

### From Audio Info

```csharp
/// <summary>
/// Create an audio feature type.
/// <summary>
/// <param name="sampleRate">Sample rate</param>
/// <param name="channelCount">Channel count</param>
/// <param name="sampleCount">Total sample count.</param>
/// <param name="name">Feature name.</param>
MLAudioType (int sampleRate, int channelCount, int sampleCount, string name = default);
```

The audio type can be created with a `sampleRate`, `channelCount`, total `sampleCount`, and optional `name`.

### From an Audio File

```csharp
/// <summary>
/// Get the audio type for an audio file at a given path.
/// </summary>
/// <param name="path">Audio path.</param>
/// <returns>Corresponding audio type or `null` if the file is not a valid audio file.</returns>
static MLAudioType FromFile (string path);
```

INCOMPLETE.

### From an [`AudioClip`](https://docs.unity3d.com/ScriptReference/AudioClip.html)

```csharp
/// <summary>
/// Get the audio type for an audio clip.
/// </summary>
/// <param name-"clip">Audio clip.</param>
/// <returns>Corresponding audio type.</returns>
static MLAudioType FromAudioClip (AudioClip clip);
```

INCOMPLETE.

### From a [`VideoClip`](https://docs.unity3d.com/ScriptReference/Video.VideoClip.html)

```csharp
/// <summary>
/// Get the audio type for a video clip.
/// Note that the sample count is merely an estimate based on the duration of the video.
/// </summary>
/// <param name-"clip">Video clip.</param>
/// <param name-"track">Audio track index.</param>
/// <returns>Corresponding audio type or `null` if the video does not have an audio track.</returns>
static MLAudioType FromVideoClip (VideoClip clip, int track = 0);
```

INCOMPLETE.

### From Streaming Assets

```csharp
/// <summary>
/// Get the audio type for an audio file in the `StreamingAssets` folder.
/// </summary>
/// <param name="relativePath">Relative path to audio file in `StreamingAssets` folder.</param>
/// <returns>Corresponding audio type or `null` if the file is not a valid audio file.</returns>
static Task<MLAudioType> FromStreamingAssets (string relativePath);
```

INCOMPLETE.

## Inspecting the Type

```csharp
/// <summary>
/// Feature name.
/// </summary>
string name { get; }

/// <summary>
/// Feature data type.
/// This will typically be a numeric type.
/// </summary>
Type dataType { get; }
```

Refer to the [`MLFeatureType`](/unity/api/mlfeaturetype.md) class for more information.

{% hint style="info" %}
The `dataType` is always equal to `typeof(float)`.
{% endhint %}

## Inspecting the Format

### Sample Rate

```csharp
/// <summary>
/// Audio sample rate.
/// </summary>
int sampleRate { get; }
```

The audio type provides information about the audio feature's sample rate.

### Channel Count

```csharp
/// <summary>
/// Audio channel count.
/// </summary>
int channelCount { get; }
```

The audio type provides information about the audio feature's channel count.


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