Bjørn Nielsen wrote: ...
Fast Track Pro soundcards. (I must also add that I have no latency in any other music software I use: pro tools, digital performer, audacity, garageband etc.)
I find this very hard to believe, is this just because you are auditioning your realtime input directly through the sound card? Because no software can process audio input and output a modified version without latency. Try playing through a plugin in realtime in protools or dp, I suspect you will notice a latency. If not, maybe you should be translating your pd patches into audio unit plugins, but I strongly suspect you will notice a latency.
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@Justin Glenn Smith: Do you have links or names of some of that measuring software you referered to? That, I really like to try out.
jack_delay, AKA jdelay: author's homepage is http://www.kokkinizita.net/linuxaudio/