I was trying to add audio and the most simple way I found to do it was to use the released version of Neo Sound Builder. Everything was working as expected until I tried to loop a bgm sample. After setting it as bgm and loop in the UI, it stopped after playing once at runtime. Any idea of why that could happen?

Apart from that, I guess I can't play the boot music during the system's eyecatcher with Builder's driver, or is there any way to do it?

I am not sure about the loop-problem but bootsound (eyecatcher command 2) is currently not supported by neosoundbuilder.
It's weird... if I play the sound twice, it starts looping normally. Maybe a driver bug? I'm probably doing something wrong, but my program at the moment it's only just that. sorry