| # Copyright (c) 2023 Amphion. | |
| # | |
| # This source code is licensed under the MIT license found in the | |
| # LICENSE file in the root directory of this source tree. | |
| import librosa | |
| from scipy import signal | |
| def extract_ltas(audio, fs=None, n_fft=1024, hop_length=256): | |
| """Extract Long-Term Average Spectrum for a given audio.""" | |
| if fs != None: | |
| y, _ = librosa.load(audio, sr=fs) | |
| else: | |
| y, fs = librosa.load(audio) | |
| frequency, density = signal.welch( | |
| x=y, fs=fs, window="hann", nperseg=hop_length, nfft=n_fft | |
| ) | |
| return frequency, density | |