Great! Look forward to seeing them
How to correlate the plot shape to auditory perception is difficult but my 2 cents
Working from the ideal single very narrow spike, which signifies that all timing is accurate from sample to sample - which means that all samples are processed at the correct time.
What happens if a sample is mistimed - it's the same as if it was a wrong sample value arriving at the right time.
In the frequency domain, it means that this sample, which should represent the amplitude of a point on a waveform, is slightly wrong in amplitude.
So back to the plots - I reckon that a single but widened spike could translate into constant fluctuations in the frequency waveform - in other words, if timing errors are significant enough (broader spike) then if a pure tone was being replayed it would be smeared away from purity. The wider the spike , the more smeared the tone.
What would be the result of two narrow spikes on the plot on replying this pure tone? I reckon it would produce two clear tones slightly off in frequency from the target tone's frequency
So how would all this be perceived playing complex signals like music? This is where the translation becomes somewhat speculative
I reckon the single broad spike will result in frequencies in the replayed music fluctuating around their recorded values - diffuse & less defined note purity - may well be more noticeable at lower frequencies as, from my reading, we seem to be more sensitive to fluctuations at lower frequencies. At a higher perceptual level, I believe this translates into soundstage definition - less precise
Two narrow spikes would be perceived in a different manner because it's creating two distinctly defined, slightly offset frequencies instead of one specific frequency for each note in the music. This may well be perceived as pleasing, giving a sense of more richness or depth (don't know just guessing on this one) to the sound?
The only way to tease all this out would be a careful & forensic approach trying to isolate just a specific change in jitter to its auditory perception possibly with pure tones, then with complex tones & then with music.
This sort of correlation between measurements & auditory perception is what is badly needed but also very difficult & complex
So far, the two narrow spikes, spaced at 10 psec or so does not seem to be audible when compared to a single narrow spike. It's worse to have a single broader spike for sure.
I have noticed a slight "hardness" to the sound when there are multiple thin peaks spaced out more.
Steve N.
Empirical Audio
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