ComfyUI Node: Audio Bandpass Filter

Audio Bandpass Filter:

The SaltAudioBandpassFilter node is designed to enhance your audio processing capabilities by allowing you to apply a bandpass filter to your audio files. This filter is particularly useful for isolating a specific range of frequencies, which can help in various audio editing tasks such as removing unwanted noise, enhancing certain audio elements, or preparing audio for further effects. By setting both a low and high cutoff frequency, you can precisely control the frequency range that passes through the filter, ensuring that only the desired frequencies are retained. This node is essential for anyone looking to refine their audio tracks with precision and clarity.

Audio Bandpass Filter Input Parameters:

audio

This parameter accepts the audio file you wish to process. The audio should be in a compatible format, typically WAV, and will be the source material for the bandpass filter operation.

low_cutoff_frequency

This integer parameter sets the lower boundary of the frequency range that will be allowed to pass through the filter. Frequencies below this value will be attenuated. The minimum value is 20 Hz, the maximum is 20,000 Hz, and the default is set to 300 Hz. Adjusting this parameter helps in removing low-frequency noise or rumble from your audio.

high_cutoff_frequency

This integer parameter sets the upper boundary of the frequency range that will be allowed to pass through the filter. Frequencies above this value will be attenuated. The minimum value is 20 Hz, the maximum is 20,000 Hz, and the default is set to 3000 Hz. Adjusting this parameter helps in removing high-frequency noise or hiss from your audio.

Audio Bandpass Filter Output Parameters:

audio

The output is the processed audio file with the bandpass filter applied. This audio will have frequencies outside the specified range attenuated, resulting in a cleaner and more focused sound.

Audio Bandpass Filter Usage Tips:

• To remove low-frequency noise such as hum or rumble, set the low_cutoff_frequency to a value higher than the noise frequency.
• To eliminate high-frequency noise such as hiss, set the high_cutoff_frequency to a value lower than the noise frequency.
• Experiment with different cutoff frequencies to find the optimal range that enhances the desired audio elements while removing unwanted frequencies.

Audio Bandpass Filter Common Errors and Solutions:

"Invalid audio format"

• Explanation: The input audio file is not in a supported format.
• Solution: Ensure that the audio file is in WAV format before processing.

"Cutoff frequency out of range"

• Explanation: The specified low or high cutoff frequency is outside the allowable range of 20 Hz to 20,000 Hz.
• Solution: Adjust the cutoff frequencies to be within the specified range.

"Audio processing failed"

• Explanation: An error occurred during the application of the bandpass filter.
• Solution: Check the input audio file for corruption or unsupported features and try again. If the problem persists, consider re-encoding the audio file.