[PD] latency issue

[Hans-Christoph Steiner]

On Oct 18, 2009, at 8:47 PM, Justin Glenn Smith wrote:

> 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.

There is no audio software without latency.  The lowest that is  
feasible on Mac OS X is probably 4ms.   Once you factor in distance  
and speed of sound, then you might see that 20ms of latency isn't  
really all that much.

20ms * 343m/s = 7.546m

So if you are 7.5m away from one of your band mates, there will 20ms  
of latency just from the sound travelling thru the air.

.hc


>
> ...
>> @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/
>
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