I'm not familiar with ST nor with using biab as a play along device in whatever configuration. I just use(d) biab for quickly getting/notating/transposing music and print it as pdf.
Right now I use MuseScore a lot. We uploaded a complete book with 680 (real book) songs into .mscz. So any song can be transposed directly on your tablet to any key.
Any new song for my bands will be converted to .mscz and uploaded. So never any problem anymore with the prefered key. Great.
I convert any song from BIAB via pdf and PDFto Music into MusicXml, import it into musescore and save it as .mscz. (BTW: the musicxml from biab isn't good enough for me). Works for iPad and for Android.
Rob


Musicians and music publishers are still wasting too much paper...come on men we live in the digitised age...Wake up!