KamiKaze Wavelet helps to cut distortion/crackling noises by cutting down the output dB from 500 HZ to 4k HZ & boosting the bass frequencies.
The sacrifice is volume, esp in the vocal range frequencies.
That is what is meant by tuning.
But what we as users are able to do with wavelet are coarse adjustments.
An engineer specialising in audio tuning can make far more granular adjustments to make the speaker sound pleasant & minimize distortions,subject of course to hardware quality of the speakers - bottom & earpiece that N uses.
I would urge you to plz go to the YT channel of Nothing, look up a video posted by Carl wherein he talks about how a gifted amateur in the US helped them tune their Ear 2 TWS to sound much better than what the N engineers had done.
That’s what hardware tuning is all about.
Peace…
Subjec