We came to a very similar conclusion. Also switched to psram with a slightly modified sample-flashloader.
This solved most of the known issues.
Currently working on a sample/editor/slicer.
SD-streaming would be wonderful but i lack the skill to...
As much as i would like to do that i don't think i will be able to provide it and probably is an issue coming from other parts of the code.
I was hoping it is kind of a known issue because of some changed code in variablePlayback.
Please ignore...
Sorry if i asked this previously @h4yn0nnym0u5e, i made a new attempt to use your modifications by dropping out temporarily other CPU and RAM hungry code to see how far i can get. I noticed that some short percussion samples end with a (full...