tfio.audio.inverse_spectrogram

Generate audio waveform from spectrogram using Griffin-Lim algorithm.

tfio.audio.inverse_spectrogram(
    spectrogram, nfft, window, stride, iterations=30
)

This is an adaptation of the method introduced in D. Griffin and Jae Lim, "Signal estimation from modified short-time Fourier transform,"

Args
spectrogram	A spectrogram with shape (None, nfft // 2 + 1). The first dimension depends on window and stride. The second contains half of the absolute values of the Fourier transforms because the FFT of a real signal is symmetrical.
nfft	Size of FFT.
window	Size of window.
stride	Size of hops between windows.
iterations	number of Griffin-Lim iterations. Change this to higher values if the reconstructed phase is not appropriate (i.e., the audio is coming out echoed or otherwise weird)

Returns
An 1-D waveform audio tensor.