record while playback?

[quote=”Macheck” post=3104]can it be used as a “regular” multitrack machine in the studio?[/quote]
No, unfortunately.

[quote=”Macheck” post=3104]Or is it either a playback or recording device only for up to 24 tracks? [/quote]
It is either playback, recording or a 24×24 I/O audio interface device.
Notice, you can link up to 4 uTrack24 to build a higher channel count (48/96) recording/playback or redundant (24/48) system.