This video is slightly misleading in that it makes the whole procedure seem shorter & simpler than it actually is. For example, it completely omits the very necessary steps that have to have been completed within the "Audio/Midi" utility application, right after connecting the external device, before one even opens up BBox itself.
As for the low level of audible sound issue, that could just as well be something to do with the audio input level adjustments of the external device as anything to do with midi (as presumed by the above response).

Last edited by Icelander; 11/04/22 08:24 AM. Reason: Further details

Just because you can, doesn't mean you should!
----------------------------------------------------------------------
BBox 2022 Audiophile, Mac Pro Intel, OSX 10.6.8, 800x600 (TV VGA)