"Skip tempo" by itself gives different waveform length than "Skip tempo" + "Round pitch"

[NintendoManiac64]

This discrepancy I previously reported a couple of months ago back in the beta version(s) seems to still exist.

Simply put, having Skip tempo adjustment for quality checked but Round pitch for quality unchecked results in a waveform that has a different length compared to if you have Skip tempo adjustment for quality checked and also Round pitch for quality checked.

...well, at least with the AppImage on Linux Mint 20.3 Xfce.

Nevertheless, the point is, why is there a difference at all between these two configurations? I thought the benefit of Round pitch for quality was for when Skip tempo adjustment for quality was unchecked, but maybe my impression was wrong...?

[mysteryx93]

if there's no actual pitch-shifting being performed (skip tempo adjustment), the operation is lossless, and there's no point in "round pitch for quality"

[NintendoManiac64]

But there is an actual difference in the length of the waveform, so...

(to be clear, I'm not talking about added and/or padded silence at the beginning or end but rather the parts with actual audio).

[mysteryx93]

if it rounds, it alters the pitch slightly differently along with the length, and the length doesn't get corrected

That seems normal

although when performing lossless stretching, the option for rounding could be disabled