Spectrum analysis - Q&A
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Compared to competing spectrum analyzers, Voxengo analyzers seem to have a reduced low-end resolution, and visually look less "fluid".
Compared to competing spectrum analyzers, Voxengo analyzers seem to have a reduced low-end resolution, and visually look less "fluid".
The resolution in the low-end part of the spectrum can be increased by increasing the FFT Block Size setting. At the same time, a lower Avg Time and an increased Overlap setting can be both recommended so that the spectrum is updated more frequently thus giving a more "fluid" looks. These recommendations are especially relevant if project's sample rate is 96000 or higher. Competing analyzers may offer pre-selected FFT analysis settings. On the other hand, Voxengo spectrum analyzers give you more choices for FFT analysis customization. Note that plugin's FPS setting and host application's audio block size also affect visual refresh rate.
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I cannot seem to equate spectrum to the overall loudness. I have -9 LUFS master, but readings across the spectrum are lower than -24 dBFS.
I cannot seem to equate spectrum to the overall loudness. I have -9 LUFS master, but readings across the spectrum are lower than -24 dBFS.
Individual components of the spectrum are usually much quieter than the summary energy, so getting readings across the spectrum lower than the overall output level is a norm. Also take a note of the "Slope" mode setting which applies a constant slope over the spectrum making lower frequencies appear quieter.
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I'm just wondering why when I play pink noise it seems to have more energy in the lower octaves, should it not be flat, I have to adjust the slope to make it flat, why is this?
I'm just wondering why when I play pink noise it seems to have more energy in the lower octaves, should it not be flat, I have to adjust the slope to make it flat, why is this?
Pink noise is -6 dB/oct slope. Yes, you'll need to configure 6 dB slope in the spectrum mode editor, to make it look flat, since the default slope is 4.5 dB/oct.
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