I have an HTC Desire Z with Android 2.2. For some reason my speech to text convertor has stopped working. Everytime the soft keyboard opens up and I press on the small mike button, it says audio problem and closes. Up until yesterday, the phone was fine. What could be the problem?
I would try clearing the data for it. Do so via
Settings -> Applications -> Manage applications and finding Voice Search (or the relevant app if you're using another) under the All tab.
I had the same problem, but i fixed it by uninstalling the updates for google keyboard and somehow everything was fixed