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32 lines
986 B
Python
32 lines
986 B
Python
import torch
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def amp_pha_stft(audio, n_fft, hop_size, win_size, center=True):
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hann_window = torch.hann_window(win_size).to(audio.device)
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stft_spec = torch.stft(
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audio,
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n_fft,
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hop_length=hop_size,
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win_length=win_size,
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window=hann_window,
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center=center,
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pad_mode="reflect",
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normalized=False,
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return_complex=True,
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)
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log_amp = torch.log(torch.abs(stft_spec) + 1e-4)
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pha = torch.angle(stft_spec)
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com = torch.stack((torch.exp(log_amp) * torch.cos(pha), torch.exp(log_amp) * torch.sin(pha)), dim=-1)
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return log_amp, pha, com
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def amp_pha_istft(log_amp, pha, n_fft, hop_size, win_size, center=True):
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amp = torch.exp(log_amp)
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com = torch.complex(amp * torch.cos(pha), amp * torch.sin(pha))
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hann_window = torch.hann_window(win_size).to(com.device)
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audio = torch.istft(com, n_fft, hop_length=hop_size, win_length=win_size, window=hann_window, center=center)
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return audio
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