[linux-audio-user] emu10k1 and jack

Steve Harris S.W.Harris at ecs.soton.ac.uk
Wed Feb 4 06:33:20 EST 2004


On Wed, Feb 04, 2004 at 12:24:48 +0100, Antonio wrote:
> I've done the question because I noticed that jamin increase the latency 
> much more then other apps (like ardour or jack-rack). For example the 
> with the setup:
> 
> midi -> ZynAddSubFX -> jack-rack -> ardour -> alsa out
>          (5.3 ms)
> 
> I have no (at least easily) audible delay when I play (using 2 periods 
> of 512 frames), while with:
> 
> midi -> ZynAddSubFX -> jamin -> alsa out

Thats because the processing in jamin is high latency - jack itsself
doesnt add any latency, no matter how many apps you connect.

Well, actually thats not true - it will add latency if you have a jack
feedback loop, but only 1 buffers worth. With trees and chains you dont
get any additional lantecy over what the app adds.

- Steve 


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