On Sun, 19 Feb 2012 14:34:40 +0200
David Baron <d_baron(a)012.net.il> wrote:
  Tmidity is a more than passable player, providing a
decent GS subset.
 It can play other soundfonts/soudfonts-combinations (if I knew how to
 do it).
 Is there any interface to timidity that would enable editing sounds
 (like on other sampled synths)?  
Hi, if it plays soundfonts, you can use swami [1] to edit those.
best wishes,
renato
[1] 
http://www.swamiproject.org/