3. The system of claim 1 , further comprising a memory storing first meanings for detected audio waveforms processed in the first mode and second meanings for some detected audio waveforms processed in the second mode.
3. The system of claim 1 , further comprising a memory storing first meanings for detected audio waveforms processed in the first mode and second meanings for some detected audio waveforms processed in the second mode. 4. The system of claim 3 , wherein the second meanings comprise at least one of a command, a punctuation mark, or an action.