fix: resolve IndexError when using spk model and the audio contains only 1 ...

Atomie CHEN

2024-03-25 ff83116369ba6afe56430cb0b9d977fbe7f4bced

1
2
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9
first    one
second    two
third    three
fourth    four
fifth    five
sixth    sixth
seventh    seven
eighth    eight
ninth    nine