14. A non-transitory processor-readable medium storing code representing instructions to be executed by a processor, the code comprising code to cause the processor to: encode a first prosodic speech signal to generate a musically encoded first prosodic speech signal by mapping each syllable of the first prosodic speech signal to a musical note; store the musically encoded first prosodic speech signal; audibly play the musically encoded first prosodic speech signal to a language student; prompt the student to recite the speech segment from which the musically encoded first prosodic speech signal originated; record an utterance from the language student in response to the prompt; delexicalize the utterance to generate a second prosodic speech signal; and calculate at least one error signal based on a difference between: a difference between a duration of a first syllable in the first prosodic speech signal and a duration of a second syllable in the first prosodic speech signal, the first syllable in the first prosodic speech signal being non-adjacent to the second syllable in the first prosodic speech signal; and a difference between a duration of a first syllable in the second prosodic speech signal and a duration of a second syllable in the second prosodic speech signal, the first syllable in the second prosodic speech signal being non-adjacent to the second syllable in the second prosodic speech signal.
14. A non-transitory processor-readable medium storing code representing instructions to be executed by a processor, the code comprising code to cause the processor to: encode a first prosodic speech signal to generate a musically encoded first prosodic speech signal by mapping each syllable of the first prosodic speech signal to a musical note; store the musically encoded first prosodic speech signal; audibly play the musically encoded first prosodic speech signal to a language student; prompt the student to recite the speech segment from which the musically encoded first prosodic speech signal originated; record an utterance from the language student in response to the prompt; delexicalize the utterance to generate a second prosodic speech signal; and calculate at least one error signal based on a difference between: a difference between a duration of a first syllable in the first prosodic speech signal and a duration of a second syllable in the first prosodic speech signal, the first syllable in the first prosodic speech signal being non-adjacent to the second syllable in the first prosodic speech signal; and a difference between a duration of a first syllable in the second prosodic speech signal and a duration of a second syllable in the second prosodic speech signal, the first syllable in the second prosodic speech signal being non-adjacent to the second syllable in the second prosodic speech signal. 19. The non-transitory processor-readable medium of claim 14 , wherein the code to cause the processor to encode includes code to cause the processor to encode the first prosodic speech signal at least partially by converting a frequency of the first prosodic speech signal to a musical instrument digital interface (MIDI) pitch note number.