---
title: Control Flags Constants
framework: applicationservices
role: collectionGroup
path: applicationservices/speech_synthesis_manager/1552213-control_flags_constants
---

# Control Flags Constants

Flags that indicate which synthesizer features are active.

## Overview

Overview These constants are used in the controlFlags parameterof the SpeakBuffer functionand in the synthFlagsl fieldof the SpeechVersionInfo structure.

## Topics

### Constants

- [kNoEndingProsody](applicationservices/knoendingprosody.md)
- [kNoSpeechInterrupt](applicationservices/knospeechinterrupt.md)
- [kPreflightThenPause](applicationservices/kpreflightthenpause.md)