# Interface AudioStream.AudioMappingOrBuilder (0.95.0)

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    public static interface AudioStream.AudioMappingOrBuilder extends MessageOrBuilder

## Implements

[MessageOrBuilder](https://cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.MessageOrBuilder.html)

## Methods

### getGainDb()

    public abstract double getGainDb()

Audio volume control in dB. Negative values decrease volume,
positive values increase. The default is 0.

`double gain_db = 5;`

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html` | The gainDb. |

### getInputChannel()

    public abstract int getInputChannel()

Required. The zero-based index of the channel in the input stream.

`int32 input_channel = 3 [(.google.api.field_behavior) = REQUIRED];`

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html` | The inputChannel. |

### getInputKey()

    public abstract String getInputKey()

Required. The `Channel`
InputAttachment.key
that identifies the input that this audio mapping applies to. If an
active input doesn't have an audio mapping, the primary audio track in
the input stream will be selected.

`string input_key = 6 [(.google.api.field_behavior) = REQUIRED];`

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.oracle.com/javase/8/docs/api/java/lang/String.html` | The inputKey. |

### getInputKeyBytes()

    public abstract ByteString getInputKeyBytes()

Required. The `Channel`
InputAttachment.key
that identifies the input that this audio mapping applies to. If an
active input doesn't have an audio mapping, the primary audio track in
the input stream will be selected.

`string input_key = 6 [(.google.api.field_behavior) = REQUIRED];`

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.ByteString.html` | The bytes for inputKey. |

### getInputTrack()

    public abstract int getInputTrack()

Required. The zero-based index of the track in the input stream.
All mappings in
the same AudioStream must
have the same input track.

`int32 input_track = 2 [(.google.api.field_behavior) = REQUIRED];`

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html` | The inputTrack. |

### getOutputChannel()

    public abstract int getOutputChannel()

Required. The zero-based index of the channel in the output audio stream.
Must be consistent with the
input_channel.

`int32 output_channel = 4 [(.google.api.field_behavior) = REQUIRED];`

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html` | The outputChannel. |