Charles,
The "wizard" check box in Biab will allow you to use your qwerty keyboard to record notes in real time into Biab's melody channel. The wizard will play notes within the key and chord sequence of your chord layout in Biab. Note: if using a DXi synth, it is best to run in ASIO driver mode for the latency gap.
Once you have "tapped" the qwerty notes in, you can open the piano roll and move them to their correct note value. The wizard allows the timing to be precise and then a simple drag in piano roll will have your melody spot-on.
Once you have done this a couple of times, you will be knocking out melodies in no time.
I use a hardware midi synth here, Yamaha Tyros. I prefer a hardware synth vs a software one here. Welcome to the forum and Biab software club

Trax