Java Sphinx "Answers Itself"
java, sphinx4
Solution
You need to understand how microphone works. It just runs a thread and stores all the audio recorded into the buffer. So when you play a reply it's also stored into a buffer for processing.
You need to call `microphone.stopRecording()` to stop microphone recording while you are playing a TTS reply.
Also you need to call `microphone.clear()` before `startRecording` call to clear the data that was previously recorded. Such data still resides in input buffer.
To get microphone component from Configuration you can use something like:
ConfigurationManager cm;
....
microphone = (Microphone) cm.lookup("microphone");
Problem
I'm having a problem with the Sphinx voice recognition library for Java. I am using it to get input and handle it. The first time I get input, it works. The second time, it immediately answers itself before I have a chance to talk. After that, it just continues to answer itself. I tried allocating before every input and deallocating after every input but that doesn't seem to work. What can I do? Code: This is the method that handles getting input: ``` public void getInput() { if (using) return; using = true; if (!allocated) { JTalk.speak("Please hold."); recognizer.allocate(); allocated = true; } JTalk.speak("Speak now."); Result result = recognizer.recognize(); if (result != null) { String resultText = result.getBestFinalResultNoFiller(); JDispatcher.getInstance().matchInput(resultText); } else { JTalk.speak("Try again."); } using = false; } ``` What you need to know: - This is being called from a `MouseListener` for a `TrayIcon`. - `speak(String)` runs `say <text>` from the `Runtime`. - `matchInput(String)` iterates over all registered listeners in an array and tests for matches. Update 2: As per Nikolay Shmyrev's answer, I tried allocating the microphone in the constructor and starting, then stopping, the microphone at the appropriate times in `getInput()`. Here's the SphinxBridge class: ``` public class SphinxBridge { private ConfigurationManager cm; private Recognizer recognizer; private Microphone microphone; private boolean using = false; public SphinxBridge() { this.cm = new ConfigurationManager(SphinxBridge.class.getResource("input.config.xml")); this.recognizer = (Recognizer) cm.lookup("recognizer"); this.microphone = (Microphone) cm.lookup("microphone"); recognizer.allocate(); } public void getInput() { if (using) return; using = true; if (!microphone.startRecording()) { JTalk.speak("Cannot start microphone."); return; } JTalk.speak("Speak now."); Result result = recognizer.recognize(); if (result != null) { String resultText = result.getBestFinalResultNoFiller(); JDispatcher.getInstance().matchInput(resultText); } else { JTalk.speak("Try again."); } microphone.stopRecording(); using = false; } } ``` However, this still doesn't work. The first, it works fine. However, for all subsequent times, it says `Speak now` and `Try again` at the same time. Solution: From the code above, I simply added ``` microphone.clear(); ``` above the line that starts recording.