Subject: Re[2]: [linux-audio-user] Advice needed re: latency tuning/optimization, esp. video
From: davidrclark_AT_earthlink.net
Date: Thu Feb 19 2004 - 17:56:18 EET
Steve,
Thanks for your comment:
>It doesnt appear to - a friend of mine has been poking his to try and
>figure out whats going on. If you send a 48k impulse through it comes back
>with clear resampling symptoms.
As I'm sure you're well aware, this should not be the case --- at least
in theory (interpolation theory). Now it is true that the emu10k1 does
32-bit integer math, not FP. So perhaps this is the explanation. I'm
unfamiliar with integer math interpolation and resampling; my
own resamplers are double-precision FP. If there is any audible effect
of resampling of the same frequency, this should be a serious indictment
against the card and against whatever algorithms or math implementation
it's using.
Now back to 44.1 K vs. 48 K: The resampling problem you mentioned should
only affect playback, not recording. So I think that everything I said
previously still applies --- other than what we just discussed.
Thanks again; I'd be interested in hearing what resulted, even if by
private email.
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