Sets the pitch (whether the voice is high or low) to be used with text to speech.
# Metadata
Platforms: desktop, server OS: mac, windows Introduced: 2.0 Security:
# Syntax
revSetSpeechPitch pitchLevel
# Params
- pitchLevel : An integer between 30 and 127.
# Examples
revSetSpeechPitch 100
revSetSpeechPitch (the thumbPosition of scrollbar "Pitch")
# Description
Use the revSetSpeechPitch command to change the way text to speech sounds.
The greater the pitchLevel, the higher-pitched the computer is when speaking text with the revSpeak command. Use a greater pitchLevel for a treble voice and a lower pitchLevel for a bass voice.
The pitchLevel is logarithmically related to the voice frequency: the range 30 to 127 corresponds approximately to the range from 50Hz to 12,000Hz. If you need to convert from Hertz (cycles per second) to the pitchLevel numbers used with this command, use the following custom function:
function pitchFromHertz theHertzFrequency get (ln(theHertzFrequency) - ln(261.625))/ln(1.05946309434) return round(60 + it) end pitchFromHertz
The pitch specified by the revSetSpeechPitch command is used for all speeches following the command during the current session. If the computer is already speaking when you execute the command, the new pitch affects the current speech.
>*Important:* The revSetSpeechPitch command is part of the > Speech library. To ensure that the command works in a > standalone application, you must include this > LiveCode custom library when you create your > standalone application. In the Inclusions pane of the > Standalone Application Settings window, make sure the "Speech" > library checkbox is checked.
# Tags
# See
- **glossary:** LiveCode custom library, command, Standalone Application Settings, custom function, text to speech, standalone application, execute - **command:** revSetSpeechSpeed, revSpeak - **function:** result - **library:** Speech library - **control structure:** function