ComfyUI Node: (deforum) Amplitude Spectral Centoid

(deforum) Amplitude Spectral Centoid:

The SpectralCentroid node is designed to calculate the spectral centroid of an audio signal, which is a measure used in digital signal processing to indicate where the center of mass of the spectrum is located. This node is particularly useful for analyzing the brightness of a sound, as higher spectral centroid values correspond to brighter sounds. By providing a clear and quantifiable measure of the spectral distribution, this node can help you better understand and manipulate audio characteristics in your AI art projects.

(deforum) Amplitude Spectral Centoid Input Parameters:

audio_fft

The audio_fft parameter represents the Fast Fourier Transform (FFT) of the audio signal. This input is crucial as it provides the frequency domain representation of the audio, which is necessary for calculating the spectral centroid. The FFT breaks down the audio signal into its constituent frequencies, allowing the node to analyze the distribution of these frequencies. There are no specific minimum, maximum, or default values for this parameter, but it must be a valid FFT representation of the audio signal.

(deforum) Amplitude Spectral Centoid Output Parameters:

spectral_centroid

The spectral_centroid output parameter is a floating-point value that represents the calculated spectral centroid of the input audio signal. This value indicates the "center of mass" of the spectrum, providing insight into the balance of low and high frequencies in the audio. A higher spectral centroid value suggests a brighter sound with more high-frequency content, while a lower value indicates a darker sound with more low-frequency content.

(deforum) Amplitude Spectral Centoid Usage Tips:

• Ensure that the audio_fft input is a correctly computed FFT of your audio signal to get accurate spectral centroid values.
• Use the spectral centroid values to compare different audio signals or to track changes in the spectral content over time.
• Combine the spectral centroid with other audio features to create more complex and nuanced audio analyses.

(deforum) Amplitude Spectral Centoid Common Errors and Solutions:

"Invalid FFT input"

• Explanation: This error occurs when the audio_fft input is not a valid FFT representation of the audio signal.
• Solution: Verify that the input provided to the audio_fft parameter is a correctly computed FFT of the audio signal. Ensure that the FFT computation is performed correctly and that the input data is not corrupted.

"Division by zero in centroid calculation"

• Explanation: This error happens when the sum of the magnitudes in the FFT is zero, leading to a division by zero during the centroid calculation.
• Solution: Check the audio_fft input to ensure it contains valid frequency data. If the input is silent or contains only zero values, the spectral centroid cannot be calculated. Provide a non-silent audio signal for analysis.