So I've already tried to record with a screen capture program that also records the sound. The realtracks from Biab was included in the capture prg, not the hardware synthesizer, although all the instruments were heard. I was only able to record the hardware synthsiser in realband, not the backing band from biab. In addition, it was not possible for me, to convert the two audio files into an mp3 audio file after cutting the two audio files, because it also told me there was a mistake. I then had to do that in cubase. so everything is very cumbersome. therefore i am very interested in a simple solution.