240 X 4 = 960. I wouldn't think there'd be an issue with that. However, the Reaper preference setting is this:
"Ticks per quarter note for new MIDI items: [240] (default: 960)"
Since I imported it as a pre-made midi file perhaps Reaper added resolution to the file and then hiccupped on the interpretation. As in; maybe some midi notes were partially overlapping some of the added ticks that did not exist in the original file. And, Reaper hesitated when it was then forced to choose a nearby tick for some notes. Maybe this happened on slight note overlaps since this is a down-up-down-up strumming acoustic guitar midi file where some notes are sounding and then sound again where there is no gap or where there is slight overlap.
This may explain why it did not occur on my 2 string midis which also came from BIAB. The strings are mostly long notes/chord that hold for entire measures.
Also makes me wonder if there might be issues if I ever use pre-made third party midi files of unknown resolution.


Does the noise in your head bother me ?