I don't know if your posters above are just screwing with you or if they just don't know their ass from a hole in the ground about audio applications.
This type of reply is why I dont usually offer advice on forums because someone else will always shoot down a suggestion without thinking for more than 5 seconds about their reply or simply just shoot off incorrect information due to solid ignorance.
The fact you are running a dual core processor will help overall because you machine has to run more than 1 processing thread at a time.
If you think for a moment you are running multiple applications the second you have booted your PC.
Examples :
Virus scan
spyware blocking tools (windows defender)
possibly third party firewall
peer to peer software
instant messaging programs
office application quickstarts
the list goes on.
So once your single audio application loads your machine is probably runing many other threads , services , applications anyways, this is where dual core and hyperthreading technologies will help your performance.
Most people buy AMD for games and graphics intensive applications , OR use it in audio because its cheaper and now widely available.
It is however solid fact that an Intel processor will beat a similar compared AMD processor in audio compression / decompression chores.
I personally just switched from a 2.8ghz Pentium 4 to a 2.2ghz AMD Turion. The AMD is a faster chip with a faster front side bus and a larger cache.
Of course its faster , its a different class of chip
(the turion is the mobile athlon 64 chip btw not a desktop chip), you are trying to compare a 64 bit processor with an older P4 processor ( hardly a fare comparison ) that is 32bit. If you want to do a fair comparison to your P4 chip then run your applications on
a 2800+ Barton core 32bit AMD athlon and see which machine runs out of steam first working with audio.
I Use an Athlon FX57 processor in my box because I game , if i didnt game i would ditch it and go for one of the higher end P4 processors.
Uptodate cost on an Intel Pentium 820 dual core 2.8 Ghz 64bit processor is $169 canadian
Uptodate cost on a AMD 64bit s939 3200+ (running at 2 ghz) is $209 canadian.
AMD will be the best bet for games , Intel all the way for Audio or any file compression / decompression.
read this :-
http://www.tomshardware.com/2004/01/06/revving_up_in_the_new_year/page36.html