I assume you are playing an instrument (or singing) and want the BIAB accompaniment to start as you hit your first note and press the pedal at the same moment. I also assume you are using a soft synth in your computer.

If this is the case you are in for a frustrating time to get it to work as you want - I know, I struggled with this for ages. The problem is all about latency and ASIO drivers and you will get lots of advice on the subject but I could never get things to work consistently without a delay. I eventually gave up and bought a sound module instead of using a soft synth and there are no latency problems.

Tony