Pobinr wrote:I'm puzzled as to why on Garageband spdif is on Ch 1&2.
So is it audacity that makes spdif Ch 5&6 on audacity, or the my Focusrite saffire pro that does so ?
From the image you posted, Audio MIDI Setup itself sees S/PDIF as channels 5 and 6. That is probably why Steve thinks it is a hopeless case.
You might be able to edit a .plist file somewhere that would change the channel allocations but you would have to ask Focusrite about that. It's risky to do things like that.
Does Garageband let you record channels 1 & 2, 3 & 4, 5 & 6 and so on? If so that is probably the key functionality that lets you record only the channels you want. The numbering may just be a GarageBand quirk that it lists digital inputs first.