just imported in, removed ALL bogus zero-duration note events and then exported all back again as FIXED; yeah, kinda tedious operation but it must be said to assert that the OP issue was all about the mid files being malformed and dysfunctional to start with.
of course I did,
just imported in, removed ALL bogus zero-duration note events and then exported all back again as FIXED; yeah, kinda tedious operation but it must be said to assert that the OP issue was all about the mid files being malformed and dysfunctional to start with.