Depends on the Amarra version. This is the best one I have found so far:
http://www.audiocircle.com/index.php?topic=105236.0
Got some best of shows with this version.
Also, you will need to do these tweaks to the Mac:
http://www.audiocircle.com/index.php?topic=105944.0
The USB port that you use is also critical. Mac Mini late 2009 with SSD and Snow Leopard is a good choice.
All of these guidelines are documented, so you can follow the instructions.
Steve N.
Empirical Audio
http://www.audiocircle.com/index.php?topic=105236.0
Got some best of shows with this version.
Also, you will need to do these tweaks to the Mac:
http://www.audiocircle.com/index.php?topic=105944.0
The USB port that you use is also critical. Mac Mini late 2009 with SSD and Snow Leopard is a good choice.
All of these guidelines are documented, so you can follow the instructions.
Steve N.
Empirical Audio