Hello Mark, you are likely using a MIDI instrument on the Soloist track. In Reaper, you need to load a DXi synth to the Reaper track for it to play any MIDI notes. For example, there are Coyote Wavetable Synth and Cakewalk TTS-1. These two DXi synths work well both in Band-in-a-Box and on Reaper tracks.


Best,
Chantelle