My apologies if this has been discussed before. I did search for it but I didn't see any subject headings that looked relevant.

I want to use BIAB to create backing track for a melody in 6/8 time. In the Set Time Signature box, I see 3/4 and 6/4, but not 6/8. There is a note in the box that reads, "Notes: For Time signature higher than 4/4, each bar is spread out over 2 or more bars (e.g. 5/4 will be written as 3/4+2/4). For 12/8 or 6/8, use 4/4 with a triplet feel (eg. Irish). For 9/8 use a waltz." When I try "4/4 with a triplet feel" I don't get anything like the feel of 6/8 time. 3/4 isn't satisfactory either; "1 2 3, 1 2 3" just is not "1 2 3 4 5 6, 1 2 3 4 5 6". Is there any way around this utterly astonishing lack in BIAB?