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from typing import NamedTuple class VoiceParam(NamedTuple): sample_rate: int = 24000 top_db: float = None pad_second: float = 0.0 class AcousticFeatureParam(NamedTuple): frame_period: int = 5 order: int = 25 alpha: float = 0.466 class Param(NamedTuple): voice_param: VoiceParam = VoiceParam() acoustic_feature_param: AcousticFeatureParam = AcousticFeatureParam()