---
title: soPitchBase
framework: Application Services
role: symbol
role_heading: Enumeration Case
platforms: [macOS 10.0+]
path: applicationservices/1552228-speech-channel_information_constants/sopitchbase
---

# soPitchBase

## Declaration

```occ
soPitchBase = 'pbas'
```

## Discussion

Get or set the speech channel’s baselinespeech pitch. This selector is intended for use by the Speech SynthesisManager; ordinarily, an application uses the [GetSpeechPitch](../1464774-getspeechpitch.md) and [SetSpeechPitch](../1462674-setspeechpitch.md) functions.The `speechInfo` parameteris a pointer to a variable of type `Fixed`.

This selector works with both the `GetSpeechInfo` and `SetSpeechInfo` functions.

> **note:** The change in speech pitch may not be noticeable until the next sentence or paragraph is spoken.