Thanks for your reply Mac, much appreceated.

You are correct, under Configuration Screen - Audio - Properties of VS100 1-2 (channels) - Tab Advanced there are the following settings :

Sound set to: 2 channel sound 16-bits, 44100 Hz (CD-Quality)

2 options, both are checked :

[x] Applications can manage this device exclusively

[x] Precede applications in exclusive mode


( Note that I translated this text from a dutch version of Windows )

So it seems that aplications such as BIAB and RB are given credentials here to manage the device by itself?

Valentino