@TF3RDL could you stop endlessly spamming the thread? It' so tiring to open the thread for news and getting another reply to yourself by you. I mean, if you want to create a new thread with your suggestions, fine. But right now 90% of posts from this thread are yours, not adding anything to the discussion or bringing anything new to the component development (just your infinite requests). Other people have pointed you the same.

• Frequency bands mode (already being developed by @Crossover though I think it is not enough)
  • IIR filter bank mode: Alternative transform algorithm that doesn't rely on FFT algorithm and it has logarithmic frequency resolution
  • Adjustable number of bands per octave: I think the making BPO adjustable allow for 1/3rd octave bands analysis and 1/24th ones
• More frequency scaling options
  • Linear and Mel/Bark/ERB frequency scales in-addition to logarithmic: Frequency bands mode should also accept linear as well as perceptual/psychoacoustic scales but in a different way (this also apply to logarithmic scale but not following octave bands, so it counts as alternate log frequency bands)
  • DC (0Hz) and Nyquist (fs/2) options for lower and upper Hz ranges respectively: As if upcoming adjustable frequency range is not enough
• FFT (fast Fourier transform)
  • Non-power of two sizes like 576 samples: And also increase the max FFT size to something like 65536 samples
  • A feature to set FFT size in milliseconds instead of samples: The actual FFT size should automatically change depending on the samplerate, kinda like built-in spectrum but better
• Expanded time smoothing options
• An option to use linear and even squared amplitude scale for calculation of RMS spectrum and also, exponential and infinite (cumulative) averaging modes should be added too
• Infinite decay rate mode for all spectrums (especially the RMS spectrum)

• Spectrum analyzer and spectrogram using custom FFT: For spectrogram display and multiple channel visualization (including Mid/Side representations of course) as well as bars display on detailed FFT mode
• Frequency bands spectrum analyzer using either FFT or CQT: For what frequency bands mode (FFT mode) would look like though I would like sinc/Lanczos FFT bin interpolation over the other because it looks more like zero-padded FFT
• Analog-style spectrum analyzer and sliding DFT visualization using AudioWorklet: What would IIR filter bank mode for frequency bands mode on foo_enhanced_spectrum_analyzer look like, though this project also have SWIFT (approximate both Gammatone filter and asymmetric FFT windowing), and variable-Q mode as well

Thank you for starting your own thread.  This will not only allow you all the freedom you need to describe your own ideas, but will allow the developer of the plugin the breathing space to post his own own news and updates in his original thread, which have been sorely missing, without fear of being "bombarded."

BTW, the Interactive Mockups you linked to are interesting;  others might try the Load from Local Device option with a music file, hit play, and then play with the "Visualization Settings" to the right of the web spectrum.

One of my own "interactive mockups" has been updated: added infinite average spectrum (previously, this mockup of one of my many foo_enhanced_spectrum_analyzer feature requests were private, and now that aspect has been made into the public now as I can now update this project and others)

It will look something like this: (not so obvious when the screenshot is a static image rather than a video or GIF of it)

@Crossover, any chances of sneak preview videos (or even a YouTube video or series of it) of what you've been working on the features like IIR filter bank and infinite averaging mode I've suggested for this component?

Calibration line "improvement": Use either linear or squared domain instead of logarithmic (dB) for calculating the calibration line based on average of all FFT bins, in-addition to a feature to use actual RMS (FIFO averaging done in squared domain) or linear averaging mode for calculating the RMS spectrum

BTW, here's the video of a mockup of new linear averaging (one of three averaging domains that I've wanted to see in the new version of @Crossover's awesome audio analyzer component) and the return of crest spectrum (that was removed in foo_enhanced_spectrum_analyzer 1.9.2.0) for the upcoming Enhanced Spectrum analyzer 2.0.0.0 update:
https://www.youtube.com/watch?v=BOcHKE7VMsk

Here's the spectral descriptor lines (horizontal = Hz, vertical = dB) could possibly look like in foo_enhanced_spectrum_analyzer:

Note that monitoring fields for these spectral descriptors (e.g. spectral centroid) are obviously going to be different from this image above and it would look more like ones from foo_loudness_peakmeter

• Spectral descriptors: This is where monitoring fields are could be introduced into Enhanced Spectrum analyzer component displaying spectral features as the song plays
• Spectrum visualization with average and crest spectrum: Re-introduction of the crest spectrum from older version of foo_enhanced_spectrum_analyzer but this time it updates at higher refresh rate and are highly-detailed and also, the averaging domain can now be selected to linear, squared, and logarithmic

const c2 = 4284900, // from 2070
      z2 = 1690000, // from 1300
      f = 80,
      f2 = x ** 2,
      s = Math.sqrt((1 + (f2) / z2) / (1 + (f2) / c2)), // shelving part
      l = ((x/f) ** 2)/Math.sqrt(0.5*(1 - (x/f) ** 2) ** 2 + (x/f) ** 2) / Math.SQRT2; // lowpass part

return s*l;