[linux-audio-user] card latency

[Robert Jonsson]

Hi David,

On Wednesday 27 September 2006 20:54, David Causse wrote:
> Hi,
>
> I played with latency thanks to jdelay from Fons Adriaensen
> and I noticed my card (Delta44) consume 61 frames and
> the Digital Mixer seems to add 2 frames of delay. 44,1 48 and 96
> give the same results.
> My nvidia CK804 included in my motherboard consumes only 14
> frames.
> I had expected better results from the Delta44.
> Maybe I'm wrong with the test?
>
> I can run ardour+jamin on a 16 tracks song at 64*2 frames
> without xruns (except when graph change).
> I am surprised that my computer can mix 16 tracks with
> eq/reverbs/comp... in the amount of 128 frames and a $200 card
> that just need to process 2ch of audio and DA/AD needs 61
> frames...
>
> Is there any other users who owns an ice1712 chip have tried
> to test their card latency?

61 frames is more than 14, but it's still not a lot.
I would guess there is a tradeof between quality and speed here, your internal 
DA/AD may not allow the quality the Delta44 does.

I did not test my latency, I'm happy with the performance.

Regards,
Robert
>
> David.