Implement pitch expressiveness controlling mechanism #97
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# Conflicts: # deployment/exporters/variance_exporter.py # deployment/modules/toplevel.py # inference/ds_variance.py # modules/toplevel.py
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Expressiveness controls how freely the variance model generates pitch curves. By default, the variance model predicts pitch at a 100% expressiveness, which means completely following the style of the voice provider. Correspondingly, a 0% expressiveness will produce pitch completely close to the smoothened music score. Expressiveness can be freely adjusted from 0% to 100%, statically, or even dynamically on frame level.
The mechanism of expressiveness is a trick on
retake_embed. Regions whereretake == 1(100% expressiveness) will generate pitch as normal, while those whereretake == 0(0% expressiveness) will return the givenbase_pitchthat represents the music score. When a linear fusion is applied on the two types of embeddings, we get the effects of an expressiveness curve with continuous values between 0 and 1.