Continuing the discussion from Dave yarwood's Alda:
That would be so nice, but well beyond the scope of Alda I guess
Being able to loop would alreay be very useful though…
But I agree a TT desktop version would be ace… I guess anyone is free to update the max version, together with a dc-coupled interface, voilá. But a CLI would be another story 
Edit: Not surprisingly, looping is planned https://github.com/alda-lang/alda/issues/7