Lab 9 Generative Synthesis

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California State University, Fullerton *

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285

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Linguistics

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Dec 6, 2023

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Name: ________________________________________________________________________ Discussion section time: __________________________________________________________ Linguistics 285: Lab 9 Goals: - Practice dynamic programming - Calculate tone values using Generative Synthesis Part1: Generative Synthesis You are creating a synthesis for the following word: “hide” [hɑid].
11. A generative synthesis would recreate this word moment by moment. Using the formants drawn on this spectrogram as a guide to which tones are the most prominent in the natural production of “hide,” which 5 tones would a generative synthesis program use to recreate this word? Notice that we’re using a sampling rate of 100 ms. Lowest Tone Tone 2 Tone 3 Tone 4 Highest Tone 300 ms 900 1100 2100 3400 4800 400 ms 950 1050 2100 3400 4800 500 ms 600 ms 700 ms 800 ms 900 ms 12. How many data points do you have for the phoneme /h/? For /ɑ/? Is Generative Synthesis sensitive to phoneme boundaries? 13. The word above is about 1 second long. It is not uncommon that a Generative Synthesis program would take 16,000 samples each second. Given that the human production has 40 harmonics at any given moment, how many tones would be used to synthesize this word? 14. There are three ways to improve the synthesis you outlined in (17). Can you name all three? a. b. c. 15. What if you wanted to synthesis the word “dye” [dɑi] instead using generative synthesis. What would you have to do? 16. What would you have to do if you wanted to synthesize the word “hide” in a Chicago dialect instead of a Southern California dialect?
17. What would you have to do if you wanted to synthesize the word “hide” in a question instead of in a statement? Part2: Machine Learning 18. Open Praat and record yourself saying the following words: “seek” /sik/ and “sick” /sɪk/. What are your F2 values for these two words? Word F2 Seek Sick 19. The words you recorded above represent a data set. A speaker produces a word with an F2 of 2400 Hz. Based on your data set from (24), is the word produced “Tim” /tɪm/ or “team” /tim/? In other words, is 2400 Hz the F2 of an /i/ or of an /ɪ/? How certain are you? 20. The class will share their F2 values for (24). This creates a larger data set. What is the highest and lowest value for the two vowels in your combined data set? What is the average? Word Highest F2 Lowest F2 Average F2 Seek Sick 21. Now, using your better dataset from (26), is a word produced with an F2 of 2400 Hz the word “Tim” or “team”? How certain are you?
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