6. A computer-implemented method comprising: under control of one or more computing devices configured with specific computer-executable instructions, generating an audio representation of a text, wherein the text comprises a word, wherein the audio representation comprises a sequence of speech segments of a plurality of speech segments, and wherein selection of the sequence of speech segments is based at least in part on a plurality of conversion rules; transmitting the audio representation and the text to a first client device and a second client device of a plurality of client devices; receiving first feedback data from the first client device, the first feedback data relating to the audio representation; receiving second feedback data from the second client device, the second feedback data relating to the audio representation; and determining, based at least in part on the first feedback data and the second feedback data, whether to modify at least one of (i) the plurality of speech segments or (ii) the plurality of conversion rules.
6. A computer-implemented method comprising: under control of one or more computing devices configured with specific computer-executable instructions, generating an audio representation of a text, wherein the text comprises a word, wherein the audio representation comprises a sequence of speech segments of a plurality of speech segments, and wherein selection of the sequence of speech segments is based at least in part on a plurality of conversion rules; transmitting the audio representation and the text to a first client device and a second client device of a plurality of client devices; receiving first feedback data from the first client device, the first feedback data relating to the audio representation; receiving second feedback data from the second client device, the second feedback data relating to the audio representation; and determining, based at least in part on the first feedback data and the second feedback data, whether to modify at least one of (i) the plurality of speech segments or (ii) the plurality of conversion rules. 14. The computer-implemented method of claim 6 , wherein a speech segment of the plurality of speech segments comprises a recording of one of a phoneme, a diphone, or a triphone.