[LAU] outfitting a computer for songwriting in linux?

[Karen Lewellen]

Hi All,
I've been a reader on the list for a while, not a poster until now.
I am preparing  to outfit a computer  for songwriting in Linux.
I will be using the command line  notation  options, of which there are 
rather 
a few from Lillypond to muscript.
I am hoping that how I picture this will match the creative reality smiles.
My first question is this.
some high end soundcards that are supported in Debian?  I know its been 
updated, but I intend using squeeze for a start.  Getting the floor solid 
before say adding  updated furniture.
While I know that four duplex cards are common, I want the best quality  I 
can find for the work.
  say if you <hope this makes sense> wanted to connect a full sized piano 
keyboard   to the card?
Thanks in advance,
Karen