# GoogleDialogueSpeakerMode

> Tracon documentation. Tracon is a .NET package family that adds a control
> plane on Microsoft Agent Framework, published as NuGet packages that run
> inside your own ASP.NET Core application.
>
> Page: https://tracon.dev/api/tracon.googledialoguespeakermode/
> Summary: GoogleDialogueSpeakerMode: How a Gemini dialogue request names its speakers.

<div class="api-provenance">Namespace Tracon · Assembly <code>Tracon.Google.dll</code></div>

How a Gemini dialogue request names its speakers.

```csharp
public enum GoogleDialogueSpeakerMode
```

## Fields

`PartMetadata = 0` 

Each turn is a text part with its speaker in the part's speech metadata. The format of the
`gemini-3.8` models.

`TextLabels = 1` 

The turns are lines of one text, each starting with its speaker label (`Speaker1: …`). The
format of the `gemini-2.5` and `gemini-3.1` preview models.

A turn whose text has a line that starts with a speaker label would change the voice, so Tracon
refuses it before the request is sent.

## Remarks

The two formats exist because the model generations disagree (measured 2026-10-25): the
`gemini-3.8` models want the speaker on every text part and refuse a speaker label in the text;
`gemini-2.5-flash-preview-tts` and `gemini-3.1-flash-tts-preview` want the label in the text
and refuse the part metadata.