9. The method of claim 8 further comprising performing a plurality of interactions with the speaker to receive the acoustic data and obtain the confirmation.
8. The method of claim 1 further comprising, collecting a grapheme label for an acoustic waveform received as speech input from a speaker, including by recording the acoustic data, recognizing the acoustic data as a potential grapheme label, obtaining confirmation from the speaker that the potential grapheme label correctly applies to the speech input, and persisting the acoustic data in association with an actual grapheme label that corresponds to the potential grapheme label upon the confirmation.