If I had to guess, I’d say it’s because the apparently-shared audio processing… uhhmmm… engine is probably due for a major rewrite. The tweaking of what I assume were the players’ SRC filters was likely a short-term stop-gap, even though it netted us an additional 10dB on 44.1khz files and about 16dB on 96khz files at 20khz. This is not Elastique’s FS setting, though you do get very slightly more highs when you turn keylock off.
The IMD+noise in RMAA and weird harmonics (varying 3.5-order-ish at about 30dB down in succession?) with single-frequency tones and the impulse response’s lovely lack of ringing are probably from non-windowed realtime FIR filters in the core engine. With IIR filters you gotta supposedly choose from gradual with its lack of ringing plus very low distortion but getting too much roll-off early, not enough roll-off late, and/or aliasing coming through or you choose steep that extends your highs plus prevents aliasing but causes nasty impulse ringing. FIR filters lack the nasty ringing and are still steep enough to prevent most aliasing, but to suppress the IMD, signal-embedded-noise, and harmonics we’re measuring now would apparently cause a delay from the combination of feedback and feedforwarding with windowing, so that’s out.
But exactly why is it seemingly being constrained as if everything’s being downsampled lossily? And why are the impulse responses modulating in amplitude over time? If I’m wrong and it doesn’t get overhauled or it otherwise must be constrained this way, then maybe they can do like on audiophile kit and just give us a couple other filter options under Utility in addition to the present FIR one and we can choose our poison, and maybe they can even make the nonlinear & odd-order-ish harmonics on the FIR one instead more linear & even-order to sound more tubey and less like a guitar pedal if they can’t be suppressed further. I presume the audio engine has other issues than just the filter tradeoffs, though, and that we ought not to have to be even making such tradeoffs. But I could be wrong.
I don’t actually think it’s that unlistenable on very dynamic and/or minimalist recordings/productions, and while it’s always got a bit of processing signature, it doesn’t start to seem smeared, congested, transiently-blunted, or crunchy or muddy (depending on the content) in an overt way unless you’re playing really dense music. Who else here sometimes mashups shoegazer? Anyone, anyone? Guess I’m the only one