python使用librosa.effects.hpss提取一定范围频率的音频
时间: 2024-03-28 18:41:30 浏览: 22
"librosa.effects.hpss" is a function in Librosa library used to perform harmonic-percussive source separation (HPSS) on an audio signal. It separates the harmonic components from the percussive components of the signal.
To extract a certain frequency range of the audio signal using "librosa.effects.hpss", you can first apply a bandpass filter to the signal to isolate the frequency range of interest. Then, you can pass the filtered signal to the "librosa.effects.hpss" function to perform the separation.
Here is an example code snippet that demonstrates this process:
```python
import librosa
# Load audio file
audio_file = "path/to/audio/file.wav"
y, sr = librosa.load(audio_file)
# Define frequency range of interest
fmin = 100 # Minimum frequency
fmax = 1000 # Maximum frequency
# Apply bandpass filter to isolate frequency range
y_filtered = librosa.effects.bandpass(y, fmin=fmin, fmax=fmax)
# Perform harmonic-percussive source separation on filtered signal
y_harmonic, y_percussive = librosa.effects.hpss(y_filtered)
# Save separated components to audio files
librosa.output.write_wav("path/to/harmonic/file.wav", y_harmonic, sr)
librosa.output.write_wav("path/to/percussive/file.wav", y_percussive, sr)
```
In this example, we first load the audio file using "librosa.load". Then, we define the frequency range of interest using "fmin" and "fmax" variables. We apply a bandpass filter to the signal using "librosa.effects.bandpass" to isolate the frequency range. Finally, we pass the filtered signal to the "librosa.effects.hpss" function to perform the separation and save the separated components to audio files using "librosa.output.write_wav".
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