MissionPlanner.Utilities.Speech.SpeakAsync C# (CSharp) Method

        public void SpeakAsync(string text)
        {
            if (text == null)
                return;

            text = Regex.Replace(text, @"\bPreArm\b", "Pre Arm", RegexOptions.IgnoreCase);
            text = Regex.Replace(text, @"\bdist\b", "distance", RegexOptions.IgnoreCase);
            text = Regex.Replace(text, @"\bNAV\b", "Navigation", RegexOptions.IgnoreCase);
            text = Regex.Replace(text, @"\b([0-9]+)m\b", "$1 meters", RegexOptions.IgnoreCase);
            text = Regex.Replace(text, @"\b([0-9]+)ft\b", "$1 feet", RegexOptions.IgnoreCase);
            text = Regex.Replace(text, @"\b([0-9]+)\bbaud\b", "$1 baudrate", RegexOptions.IgnoreCase);

            if (MONO)
            {
                try
                {
                    //if (_speechlinux == null)
                    {
                        _state = SynthesizerState.Speaking;
                        _speechlinux = new System.Diagnostics.Process();
                        _speechlinux.StartInfo.RedirectStandardInput = true;
                        _speechlinux.StartInfo.UseShellExecute = false;
                        _speechlinux.StartInfo.FileName = "festival";
                        _speechlinux.Start();
                        _speechlinux.Exited += new EventHandler(_speechlinux_Exited);

                        log.Info("TTS: start " + _speechlinux.StartTime);

                    }

                    _state = SynthesizerState.Speaking;
                    _speechlinux.StandardInput.WriteLine("(SayText \"" + text + "\")");
                    _speechlinux.StandardInput.WriteLine("(quit)");

                    _speechlinux.Close();
                }
                catch { } // ignore errors

                _state = SynthesizerState.Ready;
            }
            else
            {
                if (_speechwindows != null)
                    _speechwindows.SpeakAsync(text);
            }

            log.Info("TTS: say " + text);
        }