I can’t answer on the technical aspect but I also had the impression there was an increase of accuracy (and somewhat lower ESR aka Error t Signal Ratio) when using a longer file
As writtern in my “best practices” post
Creating your own input.wav file
I took the liberty of adding my own section of long chords and fast chord chugging to the file. It makes the file longer but I noticed it offered a slightly better result on some of the high gain simulations. I have yet to prove its result but since some of my models will be used in a band that plays in “drop C# tuning”, it won’t hurt adding a section of that to my file.
In dutch we say “baat het niet, dan schaadt het niet” which translate to “it might not do so much but at least it doesn’t hurt the outcome”
Speaking of acoustic guitars;
I had quite some success countering piezo “quack” by using an IR
Check this thread:
note that, on the webpage of the pedalboard I created, still has “with” and “without” reversed. the audio sample is first WITH and then WITHOUT the IR applied
.