Java text to speech
To be honest, probably the easiest way to do this is to execute a command line tool via Java.
To execute command line from Java in Windows
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class PowerShellCommand {
public static void main(String[] args) throws IOException {
//String command = "powershell.exe your command";
//Getting the version
String command = "powershell.exe $PSVersionTable.PSVersion";
// Executing the command
Process powerShellProcess = Runtime.getRuntime().exec(command);
// Getting the results
powerShellProcess.getOutputStream().close();
String line;
System.out.println("Standard Output:");
BufferedReader stdout = new BufferedReader(new InputStreamReader(
powerShellProcess.getInputStream()));
while ((line = stdout.readLine()) != null) {
System.out.println(line);
}
stdout.close();
System.out.println("Standard Error:");
BufferedReader stderr = new BufferedReader(new InputStreamReader(
powerShellProcess.getErrorStream()));
while ((line = stderr.readLine()) != null) {
System.out.println(line);
}
stderr.close();
System.out.println("Done");
}
}
source: https://stackoverflow.com/a/29545926
Command lines to generate speech
on Win using PowerShell.exe
PowerShell -Command "Add-Type –AssemblyName System.Speech; (New-Object System.Speech.Synthesis.SpeechSynthesizer).Speak('hello');"
on Win using mshta.exe
mshta vbscript:Execute("CreateObject(""SAPI.SpVoice"").Speak(""Hello"")(window.close)")
on OSX using say
say "hello"
on any other Linux
refer to How to text-to-speech output using command-line?
on Raspberry Pi, Win, OSX using Node-Red
npm i node-red-contrib-sysmessage
source: https://stackoverflow.com/a/39647762