this is nice.... will check it alsosam9 said:LT Spice is also good even if you have some monry. Learn first what to expect from a simulator, what features are important, etc.
If I were in a position to spend some money I would think about Beige Bag (www.beigebag.com) if only because their support section runs heavily to audio.
rayfutrell said:You can download LTspice at http://www.linear-tech.com/software/ . You can join the user group at http://groups.yahoo.com/group/LTspice/ . The user group has information on tutorials and manuals.
Ray