I am shopping for either Cubase 7 or Cubase Artist 7. Is it true that Cubase 7 can record many tracks at once while
Artist 7 can record only one track at a time?
No.
Where did you get such an information ? AFAIK, all depends of which tracks are ‘record armed’ (the red button with the black circle in it, in the track inspector). I used to have Cubase 4 Studio (which was more or less the equivalent of the now so-called ‘Artist’ one) and could record several tracks at once without problem.
So, unless a limitation has been put, since… 
Cubase Artist Supports 128 MIDI and 64 simultaneous audio tracks…
Yep, you have wrong information. Whomever you heard that from was giving bad info.
Thanks friends
So, to record 4 audio sound sources simultaeously via a UR28M, through USB 2.0, to Cubase is easy.
Are there usual problems with digital/acoustic method?
And what do you think about the UR28M’s capabilities?
What is “digital/acoustic method”…?
There´s a dedicated forum for the UR hardware.
OK re: UR hardware
re: “digital/acoustic method”, this was just general inquiry about recording acoustic instruments.